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(Source: New Energy Times)
Dear Colleagues,
THE THIRD INTERNATIONAL COLD FUSION CONFERENCE.
Held in Nagoya, 21 to 25 October 1992.
It started with a NTT Press Conference but ended with a Whimper.
Cold Fusion is now claimed with NORMAL hydrogen.
Fewer published results but more funding.
Skeptics of Cold Fusion verbally attacked.
Original experiments of Fleischmmann and Pons and Jones criticised.
Fourth Annual Conference scheduled for Hawaii - scientific meeting?
OTHER NEWS - Lawyer Triggs writes to Frank Close.
SUMMARY
The character of the annual Cold Fusion conference is changing. In the
Invited talks, only a few new results were presented which claimed excess heat
and nuclear products while many other claims were relegated to poster sessions.
These other claims included several groups saying that they observed excess
heat with normal water, ie light hydrogen - this is in contradiction with
Fleischmann and Pons and others who said it happens only with heavy hydrogen
(deuterium) and the proof that it is nuclear fusion is that it is NOT observed
with light hydrogen.
There were a number of highly unusual papers available but not all presented,
claiming Cold Fusion in biology, in tiny black holes, in gravity decays and a
Purdue group claimed it would help the Solar Neutrino Problem; also
transmutation was claimed. On the other hand the most complete experiment
in Japan according to the book of Abstracts, has been carried out over three
years by Isagawa et al. at the National Laboratory for High Energy Physics, KEK
- it was not chosen for presentation and was not mentioned - their evidence
on excess heat, neutrons and tritium was against Cold Fusion although they
found many artifacts which at first had appeared as real effects.
Near the start of the conference, Nippon Telephone and Telegraph, NTT,
held a press conference where Drs. E. Yamaguchi and T. Nishioka announced
that they had for the the first time succeeded in detecting excess heat and
helium during the experiment with high reproducibility. According to the
three-page article in Liberation of 27 October, this caused the NTT share
price to rise by over 11% (note NTT has the biggest share capitalisation
in Japan and at times in the World - the rise was worth some eight billion
dollars). The NTT share price fell quickly on subsequent days. Also it was
said that the helium was observed with deuterium and not with light hydrogen.
However at the Conference Round Table, Dr. Yamaguchi said that they had also
observed excess heat with light hydrogen. With other contradictions, it is
probably wiser to consider the press conference as premature since adequate
checks have not yet been made and the evidence for excess heat is uncertain
(see below). However NTT have offered to sell a Yamaguchi-style kit for
$565 000 and they forsee a Nobel prize for Dr. Yamaguchi(see Notes).
S. Jones and H. Menlove have tried to detect neutrons in the large
(3000 ton) Kamiokande detector; with palladium and titanium, upper
limits corresponding to 10 E -14 Watts were found. Previously they had claimed
to have observed two types of bursts, some lasting for a few hours and the
others lasting only about a hundred microseconds. However such effects were
not observed in Kamiokande and with the much lower background, all the previous
claims were disproved. They then tried cement in Kamiokande and not unnaturally
in view of the high radioactivity of cement, observed counts.
The fact that Cold Fusion is observed in some parts of the World but
not in others - called in an earlier Email "the Regionalization of Results" -
continues with Dr. F. Scarramuzzi saying that "Behind the Alps, Cold Fusion
never existed".
An expert on hydrogen in metals, Dr. F. Fukai, explained that Cold Fusion
at the rates quoted, was impossible. D.R.O. Morrison reviewed all the
published papers (over 700) and noted that the numbers of papers
published had declined steeply and that only 8 experimental ones
have been published so far in 1992 and of these 6 found no effect,
one was positive and one undecided; he concluded "It has been said
that if Cold Fusion has a 1% chance of working, we should continue.
But the best estimate is not 1%. If one accepts the Kamiokande limit
of 10 E-4 neutrons/second which is 10 E-16 Watts, then it is not 1%
but (10 E-14)% or one hundred million millionth of a percent". Both
Fukai and Morrison were verbally attacked by Cold Fusion Believers.
The meeting finished with a round table discussion where the speakers
mainly said that better experiments should be done, and then people drifted off
without any great show of enthusiasm.
One fact that was not clearly stated at the conference, is that the vast
majority of the World's scientists do not believe that Cold Fusion could
give useful energy and most do not believe in Cold Fusion. However this fact
does seem to have been recognised as when one delegate said "Who has not been
ridiculed by his colleagues?", there was a sympathetic agreement and no one
objected.
A major question is:
"Can the Annual Cold Fusion Conferences be considered as scientific meetings"?
Mr. Triggs, the lawyer of Stan Pons, has written a curious letter to Frank
Close about the facts of the curious way that the F&P peak at 2.5 MeV moved
to 2.2 MeV and the scale moved from 100 to 200 keV bins
SUBJECTS
1. Before and Organisation
2. Thursday 22 October; McKubre, Claytor, Kunimatso, Srinivasan, Oyama,
Enyo, Thompson, Fukai, Sanchez, Chien.
3. Friday 23 October; Takahashi, Mallove, Celani, De Ninno, Pons, Smedley
4. Saturday 24 October; Jones, Yamaguchi, Miles, Iida, Kasagi, Cecil, Tsarev,
Gozzi, Morrison
5. After Morrison's Invited talk
6. Sunday 25 October; Claytor, Bockris, Li (China), Tsarev(Russia),
Scaramuzzi(Italy)
7. Round Table, End of Conference
8. Next Cold Fusion conference - scientific meeting?
9. Conclusions.
NOTES
OTHER NEWS
1. BEFORE AND ORGANISATION
The conference was supported by 8 major Japanese Societies - one was the
Japanese Physical Society which I know well and which I respect, so expected
a normal scientific meeting with a balance of speakers chosen to present
different points of view and expected free and open discussion. Though not
emphasised, there was clearly some appreciable Japanese industrial support for
Cold Fusion.
There were some 320 participants which was substantially more than the
first two meetings which had about 200 each. Of these 199 came from Japan and
about a third were from industrial organisations such as Mitsubushi, Toyota,
Fuji Electrical, Sumitomo Electric, Tokyo Gas, Hitachi, Tokyo Electrical Power
Co., Osaka Gas, NTT, Honda, Nomura, Nippon Steel, Kansai Electrical Power Co.,
Sanyo Electric, Aisin Saiki Co., NKK Co., Central Research Institute of the
Electric Power Industry, also the Japanese offices of two French companies (Air
Liquide and Cogema), plus the Director and Deputy Director of the Electrical
Power Division of MITI - note that most were observers and not reporting
results. This was quite an achievement for Dr. Hideo Ikegami, the Chairman of
the Conference. There were 55 listed from the USA, 20 from Italy, 16 from
Russia and the Ukraine, 11 from China and only 19 from the rest of the World,
(which includes Stan Pons listed as from IMRA in France and Martin Fleischmann
listed from the University of Southampton and the only person from the UK) so
that it can be seen that World coverage was non-uniform.
There were only 23 talks - all of 20 minutes except Stan Pons who had
30 minutes. There were reviews of Cold Fusion in China, Russia and Italy. Also
there were two panel discussions and the meeting ended with a round table
discussion. From the abstracts it seemed that I was the only skeptic speaking.
75 papers were scheduled for the poster session - again mine seemed the only
paper presenting a skeptical viewpoint even though most of the World's
scientists think Cold Fusion is dead. The poster sessions in the afternoons
were of an unusual format - it was a very large room with many tables and the
"posters" were generally A4 pages which covered the table. Thus the morning
speakers could cover the table with their transparencies. This system worked
very well and allowed everyone a satisfactory chance of seeing the papers
and of discussing with the authors and with other participants. An afternoon was
devoted to visiting the Toyota car plant - this was very interesting as while
there was some robotization, what we saw was the production chain with many
men doing various operations - they worked steadily but did not seem to be
forced to go at too high a speed. At the end of the production line, the cars
were driven a few metres and tested immediately. (We have had Toyota cars in
the family for 19 years and they never break down so are thinking of buying
another one next year - what I saw of the production chain reinforced this
opinion).
At the spectacular conference dinner, the representative from MITI said that
they would fund research in Cold Fusion in the near future (was told they would
give about $2.5 million next year and industry would give a comparable amount)
This was not to be taken that they believed in Cold fusion (they call it
Hydrogen Energy research) but that they thought it was worth further study.
A message was read from Minoru Toyoda who is a major figure in the Toyota car
company. He founded Technova in 1978 and IMRA in 1985. After Technova
received a joint research proposal from Professors Fleischmann and Pons, he
judged that they should work for IMRA Europe at the Science park near Nice.
IMRA Japan is now also working on Cold Fusion research. Mr Toyoda is like many
of us, greatly concerned by the World Energy problems and desires a harmonious
development of Science and Technology as proposed by President Mitterand
at the 1982 summit. His message is a very sincere one. (A review paper
"World Energy in the Next Century" which is based on my Invited Talk at the
November 1991 World Clean Energy Conference and presented at the 1992 Pugwash
meeting, was submitted to this conference but not listed nor displayed).
2. THURSDAY 22 OCTOBER.
McKUBRE, CLAYTOR, KUNIMATSU, SRINIVASAN, OYAMA, ENYO, THOMPSON, FUKAI,
SANCHEZ, CHIEN.
Missed the Welcome Party on Wednesday 21 October as
was at the excellent Neutrino Astrophysics conference at Takayama and Kamioka.
We also visited the famous KAMIOKANDE experiment which detected neutrinos from
Supernova 1987A and is measuring neutrinos from the Sun now. It has 3000 tons of
highly purified water and almost a thousand large photomultipliers in the walls
which measure Cherenkov radiation. Steve Jones and Howard Menlove have been
trying to repeat their Cold Fusion experiments in Kamiokande for over a year.
Kamiokande is one of the best detectors in the World with a strong well-funded
team led by Yoji Totsuka.
On arriving was told by several people that excess heat was now being
observed in light hydrogen by several (five) groups - truely startling news as
previously the evidence that Cold Fusion was fusion of deuterium, was that the
excess heat effect was observed with deuterium but NOT with hydrogen! These
new claims change everything. In addition was taken aside and told that
transmutations were being observed! The alchemists dream come true. By an
unfortunate coincidence, none of the people telling me of these results
had been invited to speak though they could present their sensational
results at the poster sessions. Also they were not in contact with the press
as the press conferences were only for Invited Speakers.
2.1 The first talk was Mike McKUBRE of SRI who, as usual, gave an excellent
talk. He said over 200 experiments had been done on the loading of deuterium
into palladium. He showed a graph of the loading, (D/Pd = x) with a peak near
0.8 to 0.85 and a very broad shoulder going down to zero and a steeply
falling slope down to almost 1.1. He claimed that just below x = 0.93, four
experiments gave excess heat and two did not while above 0.93 all gave excess
heat. He uses closed cells. One of the fair aspects of his talk is that he
presented his excess heat results in terms of the three different ways of
expressing them;
Peak excess heat observed for a short period of time = 350%
Average excess heat during bursts = 2 to 50%
Overall excess heat from start of run = 1 to 2 to 3 to 4%.
In proposing a system which would be useful for power production, it is the
last figure of 1 to 4% which is the relevent one for power companies. It would
be good if all groups would follow Mike's example and give their claims in
three ways - maximum effect, average during bursts, and average since start
of run. This comment applies to excess heat and to nuclear products.
2.2 Tom CLAYTOR of Los Alamos gave a serious talk on the work of Ed Storms who
could not attend. He said they have claimed an excess heat of about 20%, but
when asked privately, did not know if Storms had calculated the overall total
excess heat from the start of the run. The highest loading Storms had been able
to achieve was x = 0.82 but when he took out the used palladium rods and scraped
off the crud, the maximum loading was only 0.68 - troubling if one wishes to
use the palladium repeatedly over long periods in a power plant.
2.3 Next was Dr. KUNIMATSU of IMRA Japan Co. Ltd - this appears to be a research
foundation set up by Mr. Toyoda who is closely associated with the Toyota car
company. They have spent rather generously for the last two years on Cold
Fusion research. They find a maximum loading of x = 0.88. Excess heat of up
to 35% was observed.
2.4 Dr. M. SRINIVASAN of BARC, Bombay, gave a remarkable talk. He said that
the hottest topic was the Mills and Kneizys result that excess heat was
observed with H2O (light hydrogen) when K2CO3 salts were used with a nickel
cathode and platinium anode. This, he said, was explained by Mills with a
"crazy theory with compact hydrogen atoms." He said he did not believe it but
tried and found that 17 out of 18 cells gave excess heat and many gave tritium.
Also with other alkali salts, Li2CO3 and Na2CO3, excess heat was obtained.
Three groups at BARC obtained these results. (Note - the abstract does not
contain all these results and says checks are being done).
2.5 Dr. N. OYAMA reported on experiments on excess heat in closed cells (they
abandoned open cells because "the evaluation of excess heat is complicated").
They observed excess heat of 2.42% or 0.57W/cm3. This was only in one cell out
of five (does this mean the total excess heat was 2.42/5 = 0.484% ?).
No excess heat was observed with hydrogen.
2.6 Dr. M. ENYO gave a technical talk where he tried to compare loading
obtained by electrolysis with that obtained by gas pressure - his highest
value was H/Pd = 0.9 (note this is H and not D - usually D/Pd is 5 to 10% lower
than H/Pd) by electrolysis which corresponded to 10 000 atmospheres. He said
"the equivalent hydrogen pressure should not generally be related to the
hydrogen overpotential by a simple Nernst-type equation" - this is in
contradiction to Fleischmann and Pons who claimed an enormous equivalent
pressure of 10 E26 atmospheres.
2.7 Dr. D.T. THOMPSON of Johnson Mathey gave a technical talk whose relevance
was unclear - what people really wanted to know was how much helium was there
in the Fleischmann and Pons Palladium rods after their claims in 1989?
2.8 Dr. Y. FUKAI talk was entitled "The ABC's of the hydrogen-metal system"
and the abstract was rather calm. However the talk was shattering to Cold
Fusion Believers. He noted that in D2 gas the separation of the atoms is 0.74 A
and one needs a distance of 0.15 A to obtain 10 E-20 fusions per second. He
explained why normally no two atoms can be closer than 2.1 A in a Palladium
lattice. He also explained why it is difficult to load beyond 0.83. With
vacancies in the lattice, it is possible to have up to 6 deuterium nuclei
together but as Besenbacher showed, the separation is always greater than
1.85 A as some of the palladium nuclei are displaced by 0.3 A. Further he
pointed out that undulations in the potential can reach about 1 eV but this
is small compared with the 52 eV potential so that again the fusion rate will
not be enhanced usefully. He showed that the use of a screened Coulomb
potential was erroneous. It was suggested that before starting any new Cold
Fusion experiment, one should read Dr. Fukai's book due out next January.
Prof. Preparata of Milan said forcibly that something is missing - could you
tell me why metals exist? You could not answer; and if you would answer I
would shoot it down. People find heat. You think we are idiots but people
find things.
I tried to find Dr. Fukai later in the meeting but was unsuccessful.
2.9 Carlos SANCHEZ from Madrid talked of deuterium concentration in titanium.
He concluded that there was a limit to the loading of titanium at room
temperature of 1.65 to 1.70.
2.10 Dr. CHIEN of ROC(Taiwan) presented remarkable results claiming the power
out was 8 times the input power with values up to 100 times. He is now at
Texas A&M where he now again finds remarkably large amounts of tritium.
3. FRIDAY 24 OCTOBER.
TAKAHASHI, CELANI, MALLOVE, DE NINNO, OKAMOTO, PONS, SMEDLEY.
THEORY PANEL.
3.1 PANEL of Drs Takahashi, Okamoto, Mallove, Celani and de Ninno. The main
subject was the results of TAKAHASHI et al. who have claimed 200 W/cm3 excess
heat using a new technique of rapidly varying the input power with a 12-hour
period. However they are now unable to repeat their earlier high values. A very
unusual result was that the weak neutron emission (one neutron/sec) was
decreased when the excess heat level increased - contrary to all previous
results. However Dr. Takahashi can explain it in terms of his model where
fusion can occur between two, three and four deuterons - the potential
barrier apparently being not important - many physicists find this a very
remarkable theory. He also found particles of 3 to 5 MeV which is higher than
usual theories give.
3.2 Dr. F. CELANI reported on attempts to repeat the Takahashi experiment -
the results which are still preliminary, gave excess heat but of appreciably
lower levels, about 10%.
3.3 Dr. Eugene MALLOVE reported on his and other experiments using the dynamic
Takahashi technique( he is a journalist specialising in science who wrote
the pro-cold fusion book "Fire from Ice"). He and Mr. Rothwell built their
equipment for less than $10 000, found ambiguous effects during the first
60 days. In their second run with new palladium, they found heat balance to 5%,
ie no excess heat. He said that Tom DROEGE has a wonderful thermoelectric
device which is very accurate (DROM comment - Tom is a senior engineer at
Fermilab and did a great job of work in the building of their CDF detector
which is one of the most important Particle Physics experiments. His closed
cell works as a null experiment like the Wheatstone Bridge, so that as excess
heat is observed, the input heating is decreased to preserve a constant
temperature - this means that there are no complicated calculations of sudden
artificial temperature rises induced to observe the subsequent cooling curve
to calibrate the system. His system is accurate to a few mWatt. Between
mid-September and mid-October, he observed excess heat of just under 1% which
he described on the fusion electronic net, but since has found that there was
a subtle drift in his calibration so that there was no excess heat. It is
interesting that while most people who have announced an erroneous result and
then found their mistake, do not announce this, Tom has make an equally
public retraction on the net - a sign that he is a good scientist. Thus it
seems difficult to confirm the first Takahashi result).
3.4 Dr. DE NINNO of Frascati described the transport of deuterium in Palladium.
(She did not report any continuation of the Frascati experiments which caused
such excitement in April 1989. These involved warming up from liquid nitrogen
temperatures and claimed to observe neutron emission near -30 C).
3.5 Dr. M. OKAMOTO reported that they had repeated the Takahashi technique of
low and high loading and found neutron emission from 4 out of 8 runs but of very
low intensity. The neutrons had two components, a weak 2.45 MeV component and a
stronger component at higher energy whose origin is uncertain. They believe
that they have confirmed the Takahashi result (however the neutron intensity
seems very different - paper awaited).
3.6 Stan PONS began his talk by showing a short video of four cells with
different inputs. Each cell boiled off its liquid after a different number of
days. The cells seemed to be operated in the 60 to 80 C temperature range - it
was said that the condition for success was to operate near the boiling point.
This worried some as the corrections are much larger at high temperature.
Some felt this was impressive proof, others that there are many different
ways to make a cell with palladium boil (eg G. Kreysa et al., J Electroanal.
Chem. 266(1989)437). The demonstration was not convincing to scientists
as it needed more information - one would like to see the demonstration
repeated in the presence of someone like Tom Droege to watch and test and
preferably also with several video cameras.
One striking feature of the video was the extremely small size of
the cell, barely thicker than the thumb of the person holding it. Later
the volume of the palladium was given as 0.0785 cm3 - this is much smaller
than in the original 1989 paper where it was written that results for bigger
cathodes of 2 cm diameter would be presented, but so far it seems that the
palladium used is getting smaller and smaller rather than bigger. When a serious
scientist who believes in Cold Fusion was asked about it, he replied that anyone
who works in electrochemistry knows that it is better to have small electrodes.
When it was suggested that this was bad for the commercial use of Cold Fusion
in large, one Gigawatt, power plants, he replied "Ah". In reply to a question
as to whether Cold Fusion was a surface or volume effect, Dr. Pons replied that
it was a volume effect.
He said that they were just entering their new building at the IMRA
technical centre and showed photographs of it. He said they had 32 employees.
What was remarkable about his talk is that he did not mention the recent
paper by himself {S. Pons and M. Fleischmann, Il Nuovo Cimento, 105(1992)763 }
entitled "Concerning the Detection of Neutrons and Gamma-rays from Cells
containing Palladium Cathodes Polarized in Heavy Water". This is an
interesting paper as it appears to be an attempt to answer criticisms and to
discredit the experiment of Mike Salamon et al. which was done in their Utah
laboratory beneath the table on which were 4 of their cells, and which found
nothing. Since this was not presented, it will be discussed in the Notes
at the end.
3.7 S.I. SMEDLEY of the Stanford Research Institute gave a talk on "Issues
relating to the Safe Operation of Electrolysis Cells" which was mainly about
the accident that cost Andy Riley his life. He said that many people had
experienced explosive situations with the electrolysis of Palladium but until
January without serious consequences. The pressure had risen to 30 atmospheres
before suddenly rising to 300 atm. so that a six-inch steel cylinder hit Andy.
There was no radiation. He suggested various safety precautions such as having a
strong shield against explosions and not removing the cell until it was sure
that the cell pressure was one atmosphere. Also he was wearing safety glasses
which surely saved his eyesight. He paid tribute to Andy as a fine person as
well as an excellent materials scientist, which was also my opinion as I greatly
appreciated Andy. This was not an easy talk to give, but Dr. Smedley gave a
sympathetic and well-balanced report.
3.8 PANEL on Theoretical Models, HAGELSTEIN, PREPARATA, ROMODANOV, VIGIER
Each participant talked of his theory. The Chairman asked if there was a
critical experiment. Peter Hagelstein replied that the observation of isotope
shifts was critical, 6Li to 7Li, 10B to 11B, potassium to calcium. Guiliano
Preparata said that Cold Fusion was complicated but the production of helium was
crucial. Dr. Romodanov said the only way to prove Cold Fusion was to do
reproducible experiments. Dr. Vigier said that this conference had proved that
excess heat was obtained with heavy water and probably also with light water;
the crucial experiment is to prove that light water gives excess heat - he
predicted that it would.
Dr R.T. BUSH said that light water work is being done successfully
and correlated with excess heat - Bush, Fusion Tech. 22(1992)301. It is
called alkali-fusion since potassium is changed to calcium). Dr. MALLOVE
said that light water works. Dr. Vigier agreed and said the interpretation
was non-nuclear and one should vary the mixture of D2O and H2O to prove it.
Dr. Hagelstein said that claims of 200 MJ/mole implied 200 eV per atom which
was difficult to explain by chemical means.
Dr. Preparata was asked if his theory was different from ordinary quantum
theory and if so what what other predictions were made. He replied many.
Dr. Chubb cried "That's wrong, that's wrong". Dr. Preparata, equally strongly,
cried "It is right".
4. SATURDAY 24 OCTOBER
JONES, YAMAGUCHI, MILES, IIDA, KASAGI, CECIL, TSAREV, GOZZI, MORRISON.
4.1 Steve JONES started by emphasising that there was no correspondance
between the claims of excess heat and nuclear products - if the excess heat
claims were true, then for one Watt, about 10 E12 reactions per second were
required which would yield very large amounts of nuclear products or ash.
Thus for the DD reaction to give helium, some 2ml of helium should be produced
if this reaction gives 100MJ of energy, which should be easily identifiable.
The critical test was observation of X-rays. They had done experiments
showing that the K(alpha) spectrum had a strong peak at 21 keV from
palladium. The attenuation in D2O liquid was only 60% after 2 cm. For
one watt, the 3 MeV protons should produce 600 K(alpha) X-rays per second.
They had now made a small X-ray detector which could be fitted inside an
experiment. He has offered this to Dr. Takahashi who agreed and a test will
take place on Tuesday October 27th (Note added - Steve went to Dr. Takahashi's
lab as agreed with his X-ray counter; but could not perform the measurement
of X-rays - Dr. Takahashi could not make his experiment give Cold Fusion plus
Steve had some trouble with his counter).
They are running neutron counters in a low background (0.4 counts/hour)
tunnel (they call it Pico Gran Sasso) and have observed 12 neutron bursts. The
Provo Canyon lab has been set up with the support of EPRI and is a $1 million
facility. He said that they are given encouragement and advice from Al Mann,
Steve Koonin, Charles Barnes and others (suspect this does not mean that these
three people believe in Cold Fusion).
Steve Jones reported on their work in Japan where they are running in the
Kamiokande water Cherenkov detector with cells with cement in them as they
are interested in Cold Fusion in Mother Earth. They ran in March/April 1991
and from October 1991 to February 1992. When loaded with deuterium gas they
observed neutron bursts, but not with hydrogen gas. With electrolysis
and titanium loaded with D2 gas, the number and multiplicity of the bursts
is different from that expected from uranium contamination. A plot was
shown of the multiplicity observed and that predicted from the earlier
Menlove et al. results where some agreement was obtained for low multiplicities
up to 20, but not for high multiplicities. These results are being
checked in the BYU tunnel where they are using fast-setting cement which
allows the cells to be prepared in one day and not weeks. The statistics are
low but agree. He finds this a good trigger for Cold Fusion and intends to
continue these studies in Utah.
Note; The initial reason for the Kamiokande experiment was to repeat
the Jones et al. and Menlove et al. experiments using palladium and titanium.
These experiments which occupied most of the running in Kamiokande, were not
mentioned by Steve but are discussed in section 4.9 below. In earlier versions
it was intended not to discuss the cement experiments for reasons of
politeness, but following remonstrances and claims that the cement results
are very important, it seems that some comments are required though
reluctantly.
The aim of the Kamiokande experiment was to measure nuclear products
from Cold Fusion cells, these nuclear products producing Cherenkov light
which is ultimately detected. Many nuclear products can do this - gammas,
electrons, alpha particles, neutrons, protons if energetic enough. The
Jones experiment was designed with the hope that the events would be mainly
produced by neutrons, though for example, 24 MeV gammas would also give events.
Kamiokandee has made an enormous effort to remove radio-activity from the
water, from the air (since radon is always present in mines), and from the
materials used. To put palladium and titanium which are low in radio-active
contamination is reasonable and a fairly clean experiment can be done and
interpreted in an unambigous way. However the same cannot be said about cement.
Everyone working with neutron detection knows that cement and many other common
construction materials contain large amounts of radio-active materials and
should be avoided. The random neutron emission was so high that the
Kamiokande group found that it was interfering in a significant way, with
their solar neutrino studies and asked them to desist (Kamiokande
measures about one neutrino cominf from the Sun per ten days roughly, which
is why they make such an effort to reduce radio-active background).
Recently on the Email net John Hawkinson gave a reference;
"Radioactivity in Consumer products" NUREG/cp-0001, US Regulatory Commission,
August 1978. Some numbers; generally cements have 1.1 pCi per gram for U-238
and 0.4 pCi per gram for Th-232. Gypsum from phosphate mining has appreciable
radioactive ores and phosogypsum from the manufacture of phosphate
fertilisers gives phosphogypsum and 20% of that goes into Portland Cement.
Phosphogypsum from Florida has 33pCi/gm of Ra-226, 6pCi/gm of U-238, and
13 pCi/gm of Th-230; from other states other rates. Since these cements
can produce a variety of radio-active decay or fission products, it would seem
normal to avoid them since it is unlikely that one can do a clean experiment
where one can interpret the results with confidence.
The argument has been made that "Mother Earth" has Cold Fusion and that
is why cement should be used. Some points;
A) the justification for this hypothesis is that isotope ratios vary from
place to place in the earth - but it is normal to expect variations in isotope
ratios with atom bomb tests, accretions of radio-active material, cosmic ray
reactions, etc. Such normal causes should be invoked before assuming Cold
Fusion.
B) One should always try to arrange an experiment so that as far as possible
one knows what one is doing so that the results can be interpreted and have
some meaning. For example should one wish to study "Mother Earth", one should
start by finding out what "Mother earth" is. Most people do not consider cement
as "Mother Earth".
4.2 Dr. Eiichi YAMAGUCHI of NTT said many researchers had succeeded in
finding evidence for Cold Fusion but no one had direct evidence for nuclear
products detection "in situ". Now for the first time they have succeeded in
the real time observation of helium using a quadrupole mass spectrometer
of high resolution (0.001 amu at 4 amu). The amount of helium gas was strongly
correlated to the excess heat evolution and increased with increasing the
loading ratio of D to Pd. Also tritium production has been observed as HT.
But when the system is loaded with hydrogen, H, neither helium or tritium
production is observed. Simultaneous measurement of charged particles gave
alpha particles of 4.5 to 6 MeV as well as protons of 3 MeV but as the
amount was extremely small relative to helium production, this "strongly
suggests" the occurrence of a new class of nuclear fusion in the system Pd:D(H).
These are remarkable claims, so was very surprised to hear at the Round Table
next day Dr. Yamaguchi give some additional results when he stated that with
hydrated palladium (ie with light hydrogen), a heat increase was observed
but neither helium nor tritium was found(note that this is in their paper).
They interpret their results by suggesting that the main reaction is;
d + d ---> 4He + photons/phonons
This follows Nobel laureate Schwinger who said in Z. Phys. D, 15(1900)221
that the reaction
p + d ---> 3He + photons/phonons
was favoured over the dd reaction. Since these reactions are less than
the normal strong reactions giving neutrons, tritium etc., then a "new
class of nuclear fusion is required in the system Pd:D(H)." This is a very
strong statement in their abstract.
Their basic idea is to cover one surface of a thin palladium plate with
an oxide barrier which is a surface barrier for the out-transport of
deuterium, then the Pd plate is loaded with D2 gas of about 0.5
atmospheres giving a measured loading of about x = 0.6. Then a thick gold
film is deposited on the other side to prevent d ions escaping there. Then a
vacuum is created on the oxide side. They mention their earlier work, reported
at the BYU conference (AIP 228(1990)354 ) where they claimed "gigantic neutron
bursts" of a few million neutrons for a few seconds and excess heat, but the
only evidence that they presented for excess heat was the statement that the
gold annealed to the palladium which they estimated gave a temperature of 800 C.
This is not usually considered evidence for excess heat as normally careful
controls and checks are done. In the next tests, strong currents - 5 to 7 A
are mentioned - were passed through the plates. There are two plates, A and B,
which are said to be "equivalent" but the curves of temperature variation
are different and no comment is made. The maximum temperature measured now, is
about 200 C and this seems to be taken as evidence of excess heat - again no
controls and calibrations are reported and no estimates of the amount, eg
watts/cm3, are given - unusual.
The mass spectroscopy is only done near mass 4 (Dr. Yamaguchi said it
takes about a week to set up as it is so precise) and peaks are expected at
4.00260 amu for 4He, 4.02388 amu for HT and 4.02820 amu for D2 - the accuracy
claimed is 0.001 amu. It is claimed that with D2 gas a peak is seen at the
HT mass value and this is evidence for tritium - but this peak is bigger than
the D2 peak which is remarkable as it means the Tritium has to be produced
in very large quantities and has to be very efficient in finding H ions to
give such a big peak at the HT mass. Peaks are observed developing at the
4He mass as time increases - a major question is whether there is any
glass in the system for Nate Hoffman said he has spent 6 months repeating
the Paneth and Peters 1926/27 experiment and has shown that glass always
contaims some helium and if hydrogen( or deuterium) gas is passed over the
glass then some helium comes out and will give a signal - a question that
is not clear. Again no measurements are given of the quantity of helium and
tritium produced. (Note - at first the presence of glass in the apparatus
was denied, but it seems that there was probably some - Drs. Scarramuzzi and
Sanchez will be able to say since they were to visit the NTT laboratories
after the conference and their reports are eagerly awaited).
The charged particle detectors give rather poor statistics (one peak seems
to have four events in it) and the interpretation is unclear.
The plate undergoes plastic deformation which indictes that violent
processes are taking place - experience has shown that such violent processes
can cause artifacts eg false signals in a neutron counter, and it is wise to
perform many careful checks and quantitative measurements before claims
are made.
Overall the experiment is unconvincing.
4.3 Drs M.H. MILES and B.F. Bush reported on a search for anomalous effects.
While earlier 2 palladium rods gave excess heat 7 times out of 8, a batch of
8 new palladium rods gave no significant excess heat. Studies of helium
production are hindered by this - earlier measurements gave 2 E11 helium
atoms/sec. Increases in tritium could be explainable by normal enrichment
during electrolysis.
4.4 Dr. T. IIDA (and Dr. A. Takahashi et al.) reported work with deuteron
plus He and H beams of 240 keV (ie lukewarm fusion). In addition to the
expected particles they also found peaks at 3.6 and 8.0 MeV of alpha particles.
Dr. TAKAHASHI explained these surprising results as being caused not by
lukewarm fusion but by Cold Fusion with multibody reactions, eg ddd, pdd
where the three ions react together according to the theory he has developed to
explain his surprising results (it is not clear how the high multi-Coulomb
barrier is overcome).
4.5 Dr. KASAGI studied lukewarm fusion using deuterium ions of 150 keV. Some
unusual peaks were observed.
4.6 Dr. F.E.CECIL - sorry have no notes on his talk but the abstract says
that charged particle emission was studied with silicon surface barrier
detectors, from titanium/palladium cathode glow discharges in D2 gas. The
voltage varied between 500 and 3000 V. It was concluded that some of the
observed burst events appear to be real particles from nuclear reactions at
the cathodes while others appear to be electrical pick-up by the
detectors from the randomly occurring sparking.
4.7 Dr. V. TSAREV was replaced by Drs. KALIEV and KUCHEROV who gave talks
claiming strong alpha particle and gamma emission which was reproducible.
Nate Hoffman commented that the waste material from Russian reactors contains
a high fraction of palladium - this waste material has been used to extract
palladium which is sold commercially at a very reasonable price. Hence
anyone using Russian palladium should check whether it was highly contaminated
with radioactive decay products which would give off many alpha and other
decay products.
4.8 Dr. GOZZI reported that they had 60 neutron detectors which in the 15 days
29 September to 12 October had given bursts of multiplicity up to 340 and which
were in coincidence with excess heat. No tritium was observed (note this is
the opposite of many groups who claim that tritium production is a thousand
to a hundred million times stronger than neutron production). Steve Jones
said that as neutrons were slowed down in the polythene to thermal velocities,
they should have been observed in all neutron counters not in just one sector.
Preparata - "You calibrated it". Gozzi replied by showing a graph of the
efficiency as a function of the group which showed that the efficiency
was very low except in a few groups where it rose to 0.06. Steve said he
still did not understand and they should discuss it later.
4.9 D.R.O. MORRISON gave a review of Cold Fusion Experiments. He emphasized
the Universality of Physics - the same physics laws apply on earth, in the
Sun, in Supernova, in pulsars where the density was 10 E14 times that on earth.
He recalled the basic reaction chains in the Sun noting that dd fusion was
not important, though if its rate was increased by 10 E 40 as some suggested
this might be noticeable. The dd reaction gave a compound nucleus which lasted
about 10 E-20 seconds before decaying and it always decayed the same way,
independent of its formation. The two main strong decays were to (3He + n) and
to (t + p) with a 1 to 1 branching ratio while the electromagnetic decay to
(4He + gamma) was lower by a factor of ten million (Frank Close explained
to me that there is another factor from spin apart from alpha, the fine
structure constant). This had been shown experimentally at the Second Annual
Cold Fusion Conference by Davis et al. who confirmed the ratios of 1:1: 10 E-7
down to about 2 keV. Dr. Preparata intervened and loudly said the speaker was
insulting us, this was an academic lecture and was all well known. After a
pause, the speaker continued and noted that these branching ratios of neutron
to tritium of one to one and helium4 being ten million times less, had
been confirmed at zero energy by muon catalysed fusion at which subject
Steve Jones is a world expert.
With dd fusion, the primary products were neutrons, tritium, gammas, 4He,
3He and protons while an important secondary product was X-rays of 21 keV
produced when energetic charged particles such as 3 MeV protons, passed through
palladium. The first four of these (n, t, gammas, 4He) all had major problems
due to the ease of artifacts producing false readings. However 3He, protons and
21 keV X-rays were relatively clean and reliable measurements.
As Cold Fusion is potentially so exciting, many fast experiments have been done
and presented before all checks have been made. Corrections and retractions
are not always presented using the same media. The problem is how to get a
fair unbiassed set of data to review. Have used the bibliography of Dieter Britz
which most people consider unbiassed. He takes only papers which have been
published and which therefore have been refereed. The set is up to 3 October
1992. It contains 727 relevant papers of which 256 are experimental results,
239 are theory and 232 are Others( 64 reviews, 76 technical, 35 comments,
6 rebuttals, 36 repeats and 15 {not cold fusion, eg lukewarm fusion). The
Experimental papers were 86 positive(ie supporting the existence of Cold Fusion)
and 136 null papers (finding no evidence and giving upper limits) while 34 were
indecisive or contradictory.
There was a problem that some papers were very poor (eg 2 standard deviation
effects, no hydrogen control, no calibration, only one neutron counter, no
check for artifacts, etc.) but to be as kind as possible to Cold Fusion, and to
avoid any accusation of bias, all were taken as evidence of Cold Fusion if the
authors said they were evidence.
A page of 11 figures was shown giving firstly the numbers of papers as a
function of the year - for experimental papers there were 72 in 1989(9 months),
128 in 1990, 48 in 1991 and 8 in 1992(9 months). Of the 8 in 1992, 6 were null,
one was positive and one was indecisive. Thus it can be seen that interest in
Cold Fusion peaked two years ago and is fading fast.
Secondly on this page, the numbers of results for each kind of effect
(excess heat and nuclear products) were given. For each effect the number of
null results was greater than the number of positive results. For the case of
the three products which were relatively free from artifacts, the numbers were;
Protons - 11 null and one positive
3He - 8 null and one positive
X-rays - 7 null and zero positive.
Although one says "do good experiments", many are still inadequate.
To list these is unsocial, hence the other alternative was adopted and good
experiments were selected. One criterion is number of effects measured - it was
shown that when many factors (eg excess heat, neutrons, tritium etc.) are
measured simultaneously, null results are much more frequently obtained.
Again the 727 papers listed were studied to see which ones Dieter Britz had
considered as "expert" - note this was his opinion, not that of the author.
The names of the first author of 'expert' papers are; Aberdam, Armstrong, Bacej,
Baranowski, Bennington, Besanbacher, Blaser, Bulloch, Case, Cheek, Chemla,
Divisia, Flanagan, Gottesfeld, Hayden, Ilic, Kreysa, D. Lewis( not the Lewis
from Caltech), McCracken, Menlove, Morrey, Naerger, Olofsson, Paneth, Porter,
Riley(who died tragically), Rugari, and Williams. It is to be hoped that
serious students of Cold Fusion have already read most of these papers, or if
not, will do so soon. These papers are classifed as one positive, 19 null,
2 unclear and 6 technical.
Another criterion of good experimental technique, is that the authors make
a point of saying that they looked for artifacts. Dieter Britz mentions 18 such
papers which are composed of one positive, 14 null, 2 unclear and one technical.
Again most careful workers do not find any Cold Fusion effects.
As loading is said by many to be crucial in achieving positive Cold Fusion
effects, the 727 papers were scanned for values of loadings measured. 52 papers
reported loadings - of these 16 were technical and 36 experimental; these
36 gave 3 positive, 31 null and 2 unclear. Taking only the graph of loading by
electrolysis of palladium, there is a broad peak in D/Pd near 0.8 to 0.85. Many
authors comment that there seems to be a maximum loading. This graph is very
similar to that of Mike McKubre with a peak in the same place near 0.83,
but with his higher statistics, his plot extends to higher values of just
over one, and also has a much wider tail down to zero (being unpublished the
McKubre results do not qualify). Other results quoted this week are Claytor
D/Pd = 0.82, Kumimatsu 0.88, Enyo 0.9 and Fukai 0.83. A further point is that
it seems a surprisingly high proportion of experiments with positive results
do not measure their loading.
Note - the most reliable method of measuring loading is by diffraction -
the best is neutron diffraction though X-ray diffraction can also be used.
This could be used as a calibration for other techniques such as resistance
measurments, but these all have problems and should be considered as having
appreciable errors which vary with time and conditions. In one experiment the
cathode extended outside the cell and diffraction measurements were made
on this extension, but it was not too clear how one was sure that the loading
inside was the same as that outside.
From a review by Ed Storms, a graph was shown of the log of the number
of neutrons against the log of the number of tritium atoms - it could be seen
that there was no correlation, the ratio of tritons to neutrons varying
from one thousand to one thousand million. A different explanation is that if
there are three standard deviation fluctuations in the measurement of neutrons
and three standard deviation fluctuations in the measurement of the tritium,
then such ratios are expected - the reason is that neutrons are measured
directly whereas since tritium has a half-life of 12 years, only the very
small fractionof tritium atoms which happen to decay, are measured during
the short time of the measurement. That is, this tritium/neutron ratio is
consistent with there being no Cold Fusion, only fluctuations.
Another graph is of the log of excess power, watts/cm2, against the current
(linear scale); a line is drawn which does not fit the data but does indicate
that as the current is increased there is a saturation in the Watts/cm2 at about
one watt/cm2 which seem contrary to the idea that if only the current density is
high enough, then the loading will pass some critical threshold and Cold Fusion
will occur strongly. Another interesting point about the graph is that it shows
the original values of Fleischmann and Pons who found considerable excess heat
at the very low current density of 8 mA/cm2 (indeed in their paper they wrote
over 1000% excess heat is obtainable but the only occasion was with the lowest
current density of 8 mA/cm2). The point is that Dr. R.T. Bush finds that they
obtain excess heat with normal light water but when Morrison asked him whether
this was in contradiction to Fleischmann and Pons who find excess heat only
with deuterium and believe that it is fusion because they do not find it with
light hydrogen, Dr. Bush replied that it was different because he works only at
very low current densities, 1 to 20 mA/cm2, he said. However it was pointed
out that Fleischmann and Pons also obtained excess heat in that region with
8 mA/cm2. Dr. Bush then pointed out that he used nickel and not palladium,
but Morrison asked if in his theory, were nickel and palladium not the same -
Dr. Bush replied that they were and therefore light water should have given
excess heat with palladium (please note that the statement of the equivalence
of nickel and palladium in this context, was a theoretical statement of
Dr. Bush and not by anyone else).
It is surprising at this conference that people do not jump up to point
out the contradiction that some people use light hydrogen as a control and
find no excess heat while others do find excess heat with light hydrogen.
In March 1989 in Utah, the press conference announced that Cold Fusion
gave both excess heat and fusion products, that is it was a fusion process in
which mass was converted into energy. There were great hopes of a "Clean,
virtually inexhaustable source of energy" - though it must be said that Martin
Fleischmann demurred and was more cautious. However it was quickly realised that
there was an enormous contradiction as one watt of power should have given
a million million nuclear reaction products per second which would have killed
everyone around, but the measured nuclear products were many orders of
magnitude less - about a million million times less as Steve Jones pointed out.
Thus Cold Fusion claims split into two parts;
a) Excess heat - Fleischamnn and Pons - Watts/cm3
b) Fusion Products - 40 000 neutrons/second according to F&P
- 0.4 neutrons/second according to Jones
but 10 E12 neutrons/second were expected if fusion.
An important point is that both Martin Fleischmann and Steve Jones said
that there was no secret - just a simple table-top experiment as one said. Thus
to obtain Cold Fusion there was no need for any dynamic process such as heating,
cooling, varying current as in Takahashi style. It should work just by simple
electrolysis even at low current densities such as 8 mA/cm2.
Now these two original experiments have been severely contested over the
years and it is clear that if the two original experiments which began the
current Cold Fusion excitement, are shown to be untenable, then the very
foundations of Cold Fusion should crumble. In addition to these earlier
criticisms, recently two major results have appeared that would appear
to contradict the two foundation results. It is important to consider them
and their rebuttals.
Initially Steve Jones et al. reported in Nature in 1989 that in 14 runs, one
of the runs gave a neutron rate of 0.4 n/second for 7 hours; this value was
re-evaluated later to 0.06n/s by taking the average over all 14 runs (from this
one can calculate that the total running time of the 14 runs was about 47 hours
but have been told recently the value is 79.3 hours) This was using
electrolysis with a palladium cathode. Later Steve and Howard Menlove
did another experiment with titanium which was lightly loaded with D2 gas,
in which they claimed large neutron bursts of up to 80 neutrons
counted ( corresponding to 280 source neutrons after correcting for efficiency)
in a time interval of 128 microseconds; they were especially frequent after
cooling with liquid nitrogen and then in warming up, the bursts being observed
near -30 C. They also observed two bursts of 17 and 5 hours in 1703 hours
running, or one burst per 850 hours.
Thus there were three effects claimed;
FEW-HOUR BURSTS; three bursts have been observed of several hours duration -
it may be noted that the latter two bursts are only about 10% higher than the
background but are statistically significant, though it is not clear
whether they could be the tail of a large statistical distribution.
MICROBURSTS; bursts of neutrons lasting less than 128 microseconds.
TEMPERATURE EFFECT; the microbursts are preferentially emitted near -30 C.
Note - it does not seemed to have been commented that these two types of burst
differ in time by a factor of more than ten million - a theoretical explanation
does not seem to have been attempted.
Steve Jones, Howard Menlove et al. have placed Cold Fusion cells in the
centre of the 3000 ton Kamiokande detector. As the Kamiokande detector
is in a mine (visited it on 21 October when at the Neutrino Astrophysics
conference held at Takayma and Kamioka - the experiment is impressive) and
as it has large veto counters and careful control of radon and other
possible radioactive backgrounds, very low backgrounds are obtained, hence
the previous values of 0.4 or 0.06 neutrons/second should now have been
very clear. The experiment is described in a thesis by Taku Ishida which is
admirably written and which explains all the corrections and results in
great detail - it is well worth reading just for the pleasure of its clarity,
apart from its interesting results.
They started running in January 1991. At first they tried electrolysis
with palladium and titanium cathodes but observed almost nothing, then with
titanium loaded with D2 gas and again observed almost nothing. They then
switched to cement which gave so much activity that it was suggested that
they continue elsewhere. The results are;
FEW-HOUR BURSTS; Ishida writes "Random neutron emission (ie few-hour bursts)
beyond the background level has not been observed both for the cylinders (ie
gas) and from the electrolysis samples." the numbers are;
Pressurized D2 gas
Flux upper limit = 0.00008 neutrons/second at 90% confidence
Total live time = 1310.7 hours
Electrolytic cells
April set, Flux upper limit = 0.000098 n/s at 90% confidence
Total live time = 387.2 hours.
April set, Flux upper limit = 0.000057 n/s at 90% confidence
Total live time = 569.7 hours.
Comparing these results with a total running time of 2267.4 hours, to
the 0.06 neutrons/second claimed by Jones et al. in 47 hours,
there would seem to be disagreement. (Further it may be noted that the
mass of the titanium in the Jones et al. experiment was 3 grams whereas the
average mass in the Kamiokande gas experiment was 339 grams).
MICROBURSTS
i) Menlove et al. made a claim to have observed bursts of neutrons in a time
of 128 microseconds. In real numbers they claimed to have seen many with
30, 40, 50, 60 and even 80 neutrons in the burst. Correcting for efficiency
they claimed between 10 and 280 source neutrons (below 10 was background).
In the Kamiokande gas experiment there were zero bursts which gave
4 or more real neutrons, ie there were zero bursts giving 10 or more source
neutrons.
This is the basis of the conclusion that the Kamiokande gas experiment
is in disagreement with the Menlove et al. claims.
ii) In the Kamiokande electrolysis experiment, two bursts were found with a
multiplicity of four. That is two bursts had about 11 source neutrons.
But none were observed with between 15 and 280 source neutrons. That is
no bursts were observed for most of the the region 10 to 280 and two were
observed in a very small segment, 10 to 15. Now the Menlove et al. claim is for
the range from 10 to 280 source neutrons - if it is correct, it should be
correct for the entire range not just a little corner. This a major disagreement
and is the basis for the conclusion that the Kamiokande electrolysis experiment
is in disagreement with the Menlove et al. claims.
TEMPERATURE EFFECTS
With the experiments with titanium and D2 gas and warming up from liquid
nitrogen temperatures, "bursts" of 2 or 3 neutrons were observed (with an
extended interval of 500 microseconds, not 128 - not very important) but none
of these occured during the warming up period. It is concluded that there is
no evidence for a dynamic effect near -30 C as previously claimed.
There has been some discussion as to what the observed bursts of 2, 3 or 4
neutrons could be. This may be intersting, but in no way changes the three
conclusions reached above.
One obvious interpretation was that this was radioactive contamination
for uranium fission can give up to six neutrons and plutonium up to seven
which gives about the observed multiplicity distribution, but not exactly.
There have been claims that this may be a new phenomemon at an ultra low level.
Maybe, but it should be noted that
a) Kamiokande does not measure neutrons - it measures Cherenkov light.
When an atom fissions, it emits not only neutrons directly but the fission
products plus the decay products of the short-lived elements formed. Thus there
is also emission of gammas, electrons, alphas as well and, if these are
energetic enough, they could also give Cherenkov light eventually. These
simultaneous (<500 microseconds) emissions would change the rate and the
multiplicity distribution. So the situation is complicated and not merely
the metal of the cathode must be considered, but all the components including
the brine and the deuterium.
b) It is not safe to use hydrogen in place of deuterium as a background
because while gammas do not give photo-disintegration in hydrogen, they do give
photo-disintegration in deuterium producing neutrons. Such photo-disintegration
would give additional simultaneous neutrons which would change the rate and
multiplicity distribution.
(NOTE - as these comments were contested, a complete
review of the Jones et al. experiments with palladium and titanium has been
written and is issued separately - the conclusion is that all the
experimental claims made in Jones et al. and in Menlove et al., are
disproved by the superior Kamiokande experiment with its very low background).
The General Electric paper, Wilson et al., J. Electroanal. Chem 332(1992)1,
includes Fritz Will as an author before he left to become Director of the
National Cold Fusion Institute in Salt Lake City. It consists of two parts.
Part 1 is experimental. It describes briefly a long series of experiments
firstly repeating Fleischmann and Pons's experiments as exactly as possible
(since there is no secret, this is OK), and then variations and improvements
some of which gave very high quality experiments. They find no excess heat and
no neutrons nor tritium nor 4He.
Part 2 is a very complete discussion of the analysis of the Fleischmann
and Pons experimental data. They find that the excess heat is generally
overestimated and that control samples using hydrogen which F&P claim gave
no excess heat, should have indicated excess heat if the analysis had been
performed as described. (More details of this are given in the Email
"Cold Fusion Update No. 6).
The rebuttal of Fleischmann and Pons is given in the next paper,
J. Electroanal. Chem 332(1992)33. it says that the paper of Wilson et al. is
"a series of misconceptions and misrepresentations".... "gross errors". Then
follows 20 pages of calculations etc. with the comments;
1) Fleischmann and Pons say that Wilson et al. "have not provided sufficient
information". Agree, but one can ask GE for data and hope to get it. It would
be good for Science if both sides were to exchange data.
2) Wilson and others say that the use of non-linear regression analysis
and Kalman filtering is unnecessarily complicated (F&P say it is standard but
when the audience at Nagoya was asked if they had recently used a non-linear
regression analysis to obtain excess heat - no one answered).
3) Fleischmann and Pons say that "the precise control of the level of the
electrolyte is hardly feasible" and this justifies the complicated analysis, but
if a closed cell is used, then the level is constant.
4) This argument between leading scientists is disagreeable - in view of the
crucial importance of the Fleischmann and Pons experiment to Cold Fusion, it
should be resolved. Fortunately this can be done simply by Fleischmann and Pons
doing a clean simple experiment with few corrections in a closed cell immersed
in 3 constant temperature baths as was done by their good friend David Williams
at Harwell using the device used for evaluating the amount of plutonium in
samples. This is a null measurement like the Wheatstone bridge, ie if excess
heat is produced, the heaters that keep the 3 baths above room temperature,
are lowered to keep the temperatures constant. Thus nothing changes in the
temperatures so that no elaborate corrections are needed. Loading and
nuclear products should also be measured at the same time.
It should be appreciated that the best way for Drs. Fleischmann and Pons to
answer critics would be to obtain positive results with a clean good apparatus
chosen to require few corrections as above.
Some Conclusions;
1. There is a major separation between experiments which measure excess heat
and claim watts and experiments which measure nuclear products which find
10 E-6 to 10 E-16 watts.
2. The positive experimental claims are highly dispersed and inconsistent
with one another. Some experiments are poorly designed and artifact-prone with
the consequence that artifacts are claimed as results. Answer/recommendation is
to do only good fully-instrumented and fully-calibrated experiments that need
few and unimportant corrections. Always measure loading.
3. Several experiments claim that Cold Fusion occurs in normal light hydrogen.
This is in direct contradiction with most previous Cold Fusion claims which said
the reason one knew it was Cold Fusion was because it did occurred with
deuterium and did not occur with hydrogen. It is not possible to believe
both sets of claims simultaneously.
4. There are an enormous number experiments which describe the behaviour of
hydrogen and deuterium in metals and these show that the deuterium ions are
further apart in metals than in D2 gas - as described earlier by Dr. Fukai.
5. The two original experiments of Fleischman and Pons and of Jones et al.,
are contradicted by the General Electric Company's paper of Fritz Will and
others and by the Kamiokande experiment of Jones et al., respectively.
6. It has been said that if Cold Fusion has a 1% chance of working, then it
is worth further study. But the best estimate is not 1%. If one accepts the
results from the excellent Kamiokande experimental limit of 10 E-4 neutrons
per second, then the limit is not 1% but 10 E-14% or one hundred
million millionth of one percent.
5. AFTER MORRISON'S TALK
After Dr. Preparata's loud intervention, the rest of Morrison's talk was
heard in silence, but after he finished the Co-Chairmen said nothing, but the
Conference Chairman, Dr H. Ikegami moved swiftly across and removed deftly the
microphone from the speaker's jacket and the battery from his pocket and
then quietened the tumult and booing by declaring that he wished to apologize
to the conference. He was surprised that a scientist of Dr. Morrison's
international reputation could make such a ridiculous talk and so on.
A noisy crowd then surrounded Morrison so that it was difficult for
the TV people to film this from close up. The loudest voices were essentially
Cold Fusion propagandists and it is interesting that none of their questions
or comments were direct to scientific issues but were of the nature "Have you
looked at the raw data?" One particularly interesting question was "in your
bibliography, did you include papers from 'Fusion Technology'?" This is
interesting because this journal has a reputation of being rather kind to papers
in favour of Cold Fusion - for example "Cold Fusion observed with ordinary
water", "Observation of quad-neutrons and gravity decay during Cold Fusion",
"Searching for tiny black holes during Cold Fusion" - was shown a photo of a
black hole! The editor says that more papers are refused than accepted. The
answer of Morrison was 'yes' - in order to be as kind as possible to
Cold Fusion and to avoid accusations of bias, all journals that claim to
have referees were taken, including Fusion Technology. (NOTE, have been told
that the paper on Cold Fusion and Black Holes was rejected by a referee, but
was still published to the referee's surprise - it will be interesting to
hear further comments on this).
After a time Morrison was removed from the noisy crowd by an Organiser who
said he should attend a press conference downstairs. There Dr. Ikegami was
talking in Japanese to reporters. This went on for over an hour and the phrase
"Morrison-san" was heard frequently. Afterwards the meeting broke up and none
of the reporters asked Morrison any questions though they gave their cards.
After lunch there was the poster session. As requested, Morrison spread
out copies of the 21 pages of transparencies on a table. Many gathered round
and accepted copies of the page with 11 graphs summarizing the number of
results. Dr Preparata came with his two acolytes and started attacking in a
very loud voice - interestingly enough none of his comments were scientific
and he did not question the accuracy of any of the 21 pages spread out.
One of his accolytes then started loudly and again none of his comments in any
way questioned the pages on the table though he did say he was spokesman of an
experiment. Dr. Preparata was offered a copy of the page of graphs - he took
it and ceremoniously tore it across and then tore it again and again before
moving away. Wonder if he also burns books?
After that the poster session proceeded peacefully with many friendly
conversations and people were happy to have a copy of the page of graphs.
It was noticable that then and the next day, the serious scientists such
as Steve Jones, discussed but that the principals and other propagandists
avoided the poster table.
6 SUNDAY 25 OCTOBER
CLAYTOR, BOCKRIS, LI(CHINA), TSAREV(RUSSIA), SCARAMUZZI(ITALY)
6.1 Tom CLAYTOR showed a very interesting graph of the D/Pd ratios versus the
gas pressure for many temperatures between -40C and +70C. In every case there
was a tendancy towards saturation at near 0.8 loading though further additional
pressure gave slowly increasing loadings. Also the loading was higher
the lower the temperature. This is a basic graph that all are interested in.
They used stacks of palladium and silicon and pulsed with a high current,
and deuterium gas. Tritium was measured on-line and where it appeared,
it was within 48 hours. The tritium production varied from 0.02 to 0.2 nCi
per hour; it increased with current.
6.2 John BOCKRIS working with C. Chien and Z. Minevski, obtained remarkably
large amounts of tritium as Chien had already found in Taiwan. Addition of
fresh D2O or vibrating with a gold rod stopped the tritium production but
after a few days it started again. Helium was also observed - about 1.6 E11
atoms. No 3He was observed.
6.3 Dr. X. LI gave an impressive list of institutions that are working on
Cold Fusion in different regions of China. Several groups have positive results
though the experiments are not too complex and there was no time to discuss
controls and checks. One lab used palladium from Russia.
6.4 Vladimir TSAREV summarised Cold Fusion in Russia - there are many labs
working and workshops have been held on it in Ekaterinburg and Donetsk.
Many of the results sounded most impressive with claims of 500% excess heat
and 100% reproduciblity but there was not time to determine the quality of the
checks and calibrations and to understand which labs were using Russian
palladium which could be heavily contaminated (according to Nate Hoffman).
Vladimir is an excellent cartoonist and people particularly enjoyed a drawing
of a lady in Japanese costume carrying a scroll on which the equation
E = mc2 is scored out and instead is written E = CF . This was much
appreciated by some who found it an excellent summary, while others
just enjoyed it.
6.5 Dr F. SCARAMUZZI began by talking of the "strange geography of Cold Fusion".
He said that in Japan, Russia, China and India there was a co-ordinated effort.
In the USA there was a negative official position with exceptions (EPRI). In the
EEC, it was the same except in Spain and Italy; what is still stranger is
that behind the Alps, Cold Fusion never existed.
In Italy, the INFN, CNR and ENEA all fund Cold Fusion to a total of about
$0.5 million (personnel not included). In the future it will be mainly INFN.
He listed 7 groups (10 institutes) which are working on Cold Fusion. Most
though not all are finding positive effects (he was one of the very few speakers
to say that not everyone finds Cold Fusion effects - however it is a pity he did
not mention the work of the Milano group of Ettore Fiorini who has the
reputation of being one of the best and most careful experimentalist in Italy
which is a country with a long tradition of excellent experimental work.
He has performed one of the most complete and careful experiments looking for
dd and pd fusion during electrolysis of palladium, plus mechanical straining
to look for fractofusion. No excess heat was found and no gammas, neutrons,
helium nor tritium - this in a very low background lab.).
7. CONCLUDING SESSION - ROUND TABLE
MCKUBRE, FLEISCHMANN, YAMAGUCHI, PERNG, TAKAHASHI, JONES, HAGELSTEIN,
HANSEN; Followed by comments from the audience.
The members of the Round Table were each asked to talk for a short time.
7.1 Mike McKUBRE said that the 3C's of Cold Fusion were Collaboration,
Co-operation and Correlation. After three and a half years there was no
excuse for working on a single variable. All of experiments should be
addressed and a correlation matrix established. The Harwell work which gave
a null result, had correlations, we can similarly get information. The
most interesting result is the correlation between excess power and D/Pd
loading - as the loading increases the excess power increases steeply.
We have to understand the role of light elements.
7.2 Martin FLEISCHMANN said most people would like to see excess heat, but
we say "No mystery". You must cram the deuterium in the lattice, let the
temperature rise and then get excess heat. There are three things to do -
(1) link material properties, (2) link electrochemical variables, and (3) do
more work.
The Harwell experiment is a rich source of un-evaluated data.
We will make great strides in the coming year.
7.3 Dr. E. YAMAGUCHI said the helium production was very clear in his experiment
and everyone should investigate, in situ, by real-time methods. He claimed
that they clearly saw charged particle emission. They cannot say if the
temperature rise is correlated with 4He production.
With hydrogen there was no 4He rise and no tritium but (and he said the
data was not shown on Saturday) hydrated palladium did also give excess heat
ie with ORDINARY hydrogen.
7.4 Dr. T.P. PERNG (ROC) talked of materials and hydrogen behaviour.
7.5 Dr. A. TAKAHASHI spoke of the need to correlate the excess heat and
nuclear products - it was important to find out if there was a relation or not.
He gave a list of which labs had found what ( he seemed to mainly mention
9 labs except to say that many had observed neutrons - this list was much
shorter than others such as that of Ed Storms; also it was noticeable that he
did not give any numbers or rates to see if the various experiments agreed; also
he did not talk of the more numerous experiments that did not find any effect,
nor did he quote upper limits from these null experiments).
7.6 Steve JONES said there was one form of Cold Fusion that was irrefutable
- Muon Catalysed Fusion. Since 1982 it has been known that the yield depends
on temperature. The yield had been found to be greater than expected - 150
fusions per muon; it took 8 years before this was finally accepted.
For Cold Fusion they would continue to look for a low-level trigger. This
they thought they had found - it is cement.
Somoluminesence involves the collapse of a bubble and gives a temperature
of a million degrees and a megabar pressure - he now calls it somofusion. This
might be of interest for Cold Fusion.
7.7 Tulio BRESSANI said one should relate energy measurements and neutron
spectra - one expects a neutron of 2.5 MeV. Takahashi finds 4 to 6 MeV neutrons
as well. Their own group has observed 2.5 MeV neutrons and has some indication of
something in the 4 to 6 MeV region though their counters have lower efficiency
there.
7.8 Peter HAGELSTEIN emphasized the strong relationship between theory
and experiment - he had found this out when working on X-ray lasers.
While he accepted heat from Pd/D in LiOD, did not feel the same way about
Ni/H system in K2CO3. He said he works in Theory but often hears "This
person should not be funded as he works on Cold Fusion".
On his personal wish-list, he would like;
(1) the 6Li to 7Li ratio be measured
(2) to know the value of the energy change in going from tetrahedral to
octahedral positions in palladium
(3) the measurement of radioactivity in the palladium after a Fleischmann
and Pons experiment.
7.9 Dr. L. HANSEN of BYU said that while energy was on one side of the
equation, there must also be molten ash. This was a criteria to judge
measurements of excess heat.
7.10 DISCUSSION
The Chairman, Dr. H. Ikegami invited comments from the audience.
Nate HOFFMAN noted that one should be aware of what critics think. There are
four artifacts that we should pay attention to;
1) A major problem. Helium diffuses through glass. Any glass in an apparatus
has 4He in it and this can lead to false readings
2) gammas in Cosmic rays can give photo-disintegration of deuterium which
can give neutrons
3) radon decay products can be very troublesome, giving 8 MeV alphas, also
210Pb gives a 18 keV beta which can be mistaken for a tritium decay.
4) there is liable to be some radioactive palladium soon on the market place
as palladium is being extracted from Russian reactors. Hence must take care
and measure the radioactivity of Pd BEFORE the Cold Fusion experiment is
done.
Comments were then invited from the floor.
Robert BUSH stated that there was very strong evidence for transmutation
of light elements in water (ie ORDINARY water). In one year overwhelming
evidence. Later in answer to a question, he said that his light water work was
in a closed cell.
Dr. CHUBB said that there was a lack of internal review, especially of
light water work. It is necessary to have outside observers as credibility is
important. The loading should be given.
Steve JONES announced that they are setting up to do an experiment (in D2O)
with picosecond timing.
The Conference Chairman, Dr. IKEGAMI asked for futher comments - silence.
So everyone slowly got up and prepared to go. However after a while the
Chairman called the meeting to order again. He thanked people for their
presence at such an exciting meeting where we were informed that reproducible
and controllable Cold Fusion had been observed. Especial thanks to Drs.
Fleischmann and Pons and to Drs. Yamaguchi and Nishioka who had new and
remarkable results. He said we are working for the future generation of
energy in the 21st century.
He said the International Advisory Committee had decide that the next
Conference would be in Hawaii.
The meeting closed with half-hearted applause.
8. NEXT COLD FUSION CONFERENCE - SCIENTIFIC MEETING
The Third Cold Fusion conference was sponsored by several respectable
scientific organisations who have a long tradition of free and balanced
scientific debate. After more that three years since the 1989 Fleischmann and
Pons press conference, it was well known that the majority of the World's
scientists did not believe in Cold Fusion and that there were many null
experiments. It was to have been expected that the Organising Committee and
the International Scientific Advisory Committee would have known this and when
inviting speakers, would have chosen a balance. But only one sceptic was
invited (Dr. Fukai was invited as a technical expert and it was a surprise
when he reported that Cold Fusion should not work from the accumulated knowledge
of many experiments). The token sceptic, who has never hidden his conclusions,
was apparently expected to advise on how to perform future experiments (though
the abstract also said that the experimental results will be reviewed).
In a normal scientific conference, more sceptics should have been
invited to join the International Advisory Committee and then invited to speak
at the conference. And when the token sceptic spoke, an orderly discussion
should have followed. Instead of that for the Conference Chairman to take
over from the session chairmen, then insult the invited speaker and close the
session without any scientific discussion, cannot be considered normal
scientific behaviour. It must have come as a surprise to the scientific
societies that sponsored the conference.
It was announced that a Fourth Cold Fusion conference will be held in
Hawaii in 1994. Will this be a scientific conference? Will it be sponsored
by any scientific society that believes in free and balanced debate?
It is unlikely to be sponsored by the University of Hawaii as the University
which initially took some responsibilty for the patents based on the Cold Fusion
claims of some of their employees, organised a committee to investigate these
claims and has now given up their interest in these patents.
10 CONCLUSIONS
(1) Overall there were fewer presentations of positive results than in
previous annual conferences. This confirms the statistics on published papers.
(2) Many of the positive results tended to be "exotic" and different from
the original Fleichmann and Pons and Jones techniques which were simple and
"passive" unlike the present tendency towards "active" methods such as
sharply varying the voltage or temperature.
(3) The biggest result was that some five groups claimed that positive
effects were now being observed with LIGHT water. This was a shock as
previously the justification that fusion was being observed was that the
positive effect was observed with deuterium and NOT with hydrogen. However
this comment was not made by anyone other than myself, and I had no response.
(4) Some of those claiming fusion with light water also claimed to have
observed transmutation - the alchemists dream!
(5) The two experiments which started all the Cold Fusion effect, have both
been very seriously put in doubt. A GE group with Fritz Will, the former
Director of the Utah Cold Fusion Institute, found no effects in extensive
attempts to repeat the experiments. Further checked the calculations
(non-linear regression analysis with kalman filtering) and found that they had
major problems and had not proved excess heat existed. Also the original
experiment of Jones et al. is contradicted by the Kamiokande experiment.
Thus both the foundation experiments are unreliable.
(6) The Takahashi et al. experiment which was welcomed and advertised,
cannot now repeat the original levels of the effect claimed (this often
happens to Cold Fusion groups, eg Huggins). Also he has the unique result that
the yield of neutrons goes down as the excess heat increases.
(7) The NTT - Yamaguchi experiment was pre-announced by a press conference
before it was presented for scientific discussion and evaluation at a conference
- a procedure that is generally criticised. Afterwards there were serious
criticisms about glass in the apparatus and the method of measuring
excess heat. Further it was later announced that excess heat was also
obtained with light hydrogen.
(8) The incredible 8 billion dollar movement in the NTT share value showed
the powerful attraction of the dream of Cold Fusion. However the reality, the
numbers, have to be looked at. After three and a half years the present claims
of Cold Fusion are not substantially greater than in March 1989. And the
majority of experiments find no excess heat. Further the better the quality
and care of the experiments, the smaller the proportion that make claims.
Further as Dr. Fukai showed, the thousands of experiments on deuterium and
hydrogen in metals are against Cold Fusion.
(9) There is a major contradiction between the excess heat claimed of
the order of Watts, and power calculated from the nuclear products observed.
This is a question of factors of millions or billions or millions of millions -
completely incompatible. If the basic source of the energy is the
conversion of mass to energy, then there must be some nuclear products, but no
Believer has solved this problem. This alone is a major reason for concluding
that there is no fusion. Some believers in the existence of excess heat then
say it is not a nuclear process, but then what could it be that would be of
any practical interest?
(10) Many Believers in Cold Fusion genuinely want the Annual Cold Fusion
conference to be a normal scientific meeting. But with the choice of speakers
and rules, they have not been. This Nagoya meeting made it obvious to all
that the Annual meeting is not scientific.
(11) The Regionalisation of Results (CERN/PPE 90-159, 1990) is stronger
than ever and was described by Dr. Scaramuzzi to the embarrassment of the
audience, but without protest.
(12) The overall funding of Cold Fusion is increasing. The previously
known funding is decreasing and only INFN and EPRI are continuing appreciably.
EPRI (US Electrical Power Research Institute) funding is partly used in the US
and makes serious contributions to certain countries abroad, especially to
Russia, China, etc. Figures of $3 to $12 million have been advanced but it
is seldom clear over how many years this is. At the Nagoya meeting, one
became aware of major Japanese funding from industry, especially Toyota and next
year MITI may invest some $3 million, but it comes under the umbrella of
"Hydrogen Energy Research".
(13) In Japan the two most careful experiments have both given strong
evidence that Cold Fusion will not give excess heat. They are the KEK
experiment which was rather complete, and the Kamiokande experiment.
(14) It is sometimes said that if Cold Fusion had a one percent chance
of giving excess heat that would be useful for power generation, then it
should be studied. But the experimental results from Kamiokande show that
this number is not one percent but is one hundred million millionth of one
percent.
(15) If one takes all the factors, experiments, theories etc. together,
the balance of evidence is strongly against the existence of Cold Fusion.
Having looked at the evidence for and against, more than 99% of the World's
scientists do not believe that Cold Fusion could give useful energy.
NOTES.
i) This is a long review with probably well over a thousand pieces of
information so there must be some mistakes. Will be pleased to receive
corrections.
From experience expect there will be some propagandists who will use the
technique employed by a few unscrupulous lawyers, of taking one error and saying
that hence all must be false. Scientists on the other hand, try and take ALL
data and theories and try and make sense of them - and as Dick Feynman would
point out, it is sometimes necessary to make sense of all the available
information, to assume that some experiments are mistaken. However doubt if
a few errors will change the overall impression of the conference which was
of a winding down with fewer new results than in previous conferences,
an increase of propaganda and an increase of regional funding plus some
extraordinary results, some of which (fusion in ORDINARY water), contradicted
previous work, plus some cranks. Also some errors will not change the
impression that this was not organised to be a normal scientific conference
since no serious attempt was made to report the many experimental results
which have made the majority of scientists disbelieve in Cold Fusion.
ii) In a note it is not possible to report everything - please ask the
people named for further details.
iii) CURIOUS STORY. In an early partial version, a curious story was added
describing how a demonstration had been set up by Dr. Notoya of Hokkaido on
a table just outside the conference room. It was said to show two identical
open cells with ORDINARY water but one with K2CO3 and nickel cathode, and
this latter cell was much hotter to the touch than the calibration cell. This
was claimed to show Cold Fusion with ordinary water. However David Buehler,
a student of Steve Jones, noticed that the electrical leads were not identical,
the one to the control cell was much thinner so that its resistance was higher
and energy was dissipated in the thin wire and not in the control cell as
advertised. He checked by moving the clip.
He and Steve were savagely attacked (as usual!), but Steve showed from his
log-book that the effect was serious and then later after further exchanges,
they repeated the experiment in BYU based on these numbers, and showed a
10 degree temperature difference.
Dr. Notoya will be visiting the States and is going to repeat her
demonstration at MIT on 4 December and it is said by her propagandist that
it will work, later he said it might not. Have the impression that some will
try and concentrate on the size of the wires which are sure to be the same
this time. However this is a red herring. The real problems are two-fold;
a) one of the voltages is 1.48 Volts higher to compensate for electrochemical
effects - but Tom Droege has already found that this number of 1.48 V is not
safe and others have also shown this recently. So this value of 1.48 V has
to be established first
b) only do good calorimetry with closed cells and several constant temperature
baths surrounding the cell. (It has been said one needs to do a non-linear
regression analysis to obtain a result with such an open cell!)
OTHER NEWS
A).The Wall Street Journal of 27 November reported that NTT is selling a kit
containing all instructions and equipment needed to replicate the Yamaguchi and
Nishioka experiment. The price is $565 000 and it is obtainable from Advanced
Film Technology INC which is 51% owned by NTT. Steve Jones says the W.St.J.
quotes the NTT President, Masashi Kojima, as saying that "the result will
likely be a Nobel prize for Mr. Yamaguchi" if another scientist replicates
Yamaguchi's experiment, and says that NTT might "become a power company based
on cold fusion", quoting the NTT President. Have just checked the NTT share
price at the time of this announcement - there was no billion-dollar jump
in the share price this time.
B). Frank Close has been following up the way in which a first graph of
Fleischmann and Pons showing a peak at 2.5 MeV moved to 2.2 MeV. He notes that
this was after a talk by Martin at Harwell on March 28th, when he was told
that while the neutrons should emerge with an expected energy of 2.5 MeV,
they should be slowed down to thermal energies before being captured, and hence
the peak should be at the lower value of 2.2 MeV. Frank says that at 09.32 on
the 30th March a Fax was sent from the University of Utah Chemistry Department
making the change.
The graph was also changed in that the bin size switched from 100 to 200 keV,
but the shape of the distribution of data points on the graph did not change.
Fleischmann has written that this was a change caused by going from a linear
to a quadratic interpolation - but this makes no mathematical sense.
A further change was that the number of counts jumped by a factor of nine.
It is hard to see how these three changes from one graph to the other,
could be covered by patent secrecy. No doubt the judge in the La Repubblica
trial would like to study the documents.
In reply to a recent letter from Frank to Martin, a letter has been
received from Mr. Triggs, the laywer of Stan Pons. He says that pending patent
applications, all documents relating to work in Utah are prime source materials
and are confidential. He warns Frank about the documents he has and says that
there were thefts from his clients' laboratory. Now this is a serious criminal
matter and it would be interesting to see the reports of the University
authorities and Police on these thefts - these documents would presumably not be
covered by patent problems. It should be noted that Frank has no intention of
revealing any sources or information which are not already in the public record.
C) The Fleischmann and Pons paper mentioned in section 3.6, firstly describes
new measurements they have performed using a high resolution, but low
sensitivity (efficiency) Germanium detector. One of the points they wish to
make is that this is better than a low resolution, high efficiency detector
as used by those who found nothing. However their new Ge detector efficiency is
only 2 E-5 which is not so different from their old BF3 detector (dosimeter)
which was 2.4 E-6 (this why their old counting rate was so low even though
they claimed 40 000 neutrons per second after correcting for efficiency).
The gamma ray spectra they present show a smooth background with some very sharp
resolved peaks and there is a large sharp peak near 2.2 MeV where one expects
a peak from capture of slow neutrons, the actual value being 2.224 MeV. It takes
a minute to realise (and one is not told till much later) that this splendid
peak is background from 214Bi at 2.204 MeV and the miserable little bump to
the right of it, is the peak at 2.224 MeV - the relative peak heights is
19 to 1.
Now there are neutrons everywhere, from cosmic rays, from the plaster,
concrete etc. so there should be a peak at 2.224 MeV especially as the
experiment has not been done deep underground nor is there special shielding.
So the question is how was the normal background measured? There is no
description in the paper of the measurement of this unavoidable background -
so it is possible that this small peak is 100% background. However there are two
measurements reported AFTER the current was switched off and these are said to
extend to two diffusional lifetimes, so it is tempting to consider these as
background measurements - and since small peaks are seen at 2.224 MeV of about
the same height as the ones observed, one would normally conclude that this
shows that there are no extra neutrons coming from Cold Fusion in addition
to the unavoidable background. However such is not the conclusion of
Fleischmann and Pons who instead conclude that this is an interesting and
significant effect lasting up to 30 days after the current was switched off.
Why did they not calibrate BEFORE the experiment began?
They claim a rate of 5 to 50 neutrons per second per Watt which they note
is less than their previous value of 4000 neutrons per second (the 1989 paper
says 40 000 neutrons per second). They do not see this as a discrepancy, but
claim this must be due to them under-estimating the sensitivity of the previous
instrumentation (ie by several orders of magnitude).
They claim that previous works, Petrasso et al. and Salamon et al.
were insensitive because with their poorer resolution, they would not have been
able to see the 2.224 MeV peak because it would be buried in the 2.204 MeV which
would now be wide - and they present a graph to illustrate this. Now if the
efficiency of these two experiments was as poor (2 E-5) as that of Fleischmann
and Pons, this would be true. But it is not true, because their efficiency
was very much higher so that for the suggested neutron rate, their peak would
have been much bigger than the 214 Bi peak at 2.204 MeV and been clearly
visible. To give some numbers, if their efficiency was as low as 2% which is
1000 times more than F&P's, their peak would have been 1000 times bigger and
this would have been 50 times bigger than the 214 Bi peak at 2.204 MeV.
The conclusion is that the paper, as presented, gives no compelling
evidence of any neutrons from the Cold Fusion cells.
Overall the measurement of neutrons at fairly low counting rates is not
easy as many have learnt, and it is best left to experts.
HAVE A NICE TOMORROW
this delightful phrase was seen in a Takayama shop window).
(c) Douglas R.O. Morrison.