On Sat, Aug 10, 2013 at 9:37 AM, Teslaalset <[email protected]>wrote:
IInteresting analysis of LENR experiments by Norman D. Cook and Valerio > Dallacasa, presented at ICCF 18. Shifts in isotopic percentages in LENR > 'fuels'. > It has some interesting hooks with Rossi's claim on Ni62 being essencial > and Defkalion menitioning that Ni61 does not participate in Ni-H LENR > reactions. > Their slides are interesting. I do not know what to make of their FCC nuclear model. It does not seem to be required for what they are describing -- it is sort of an appendage that they have taken the opportunity to insert into their analysis. What was interesting was that they were able to model the surface isotope transitions, and, by adjusting a parameter, get good agreement with the SIMS results from Mizuno and Rossi and with anecdote from Defkalion (perhaps they were using real spectra from Defkalion for their analysis as well). What stands out in their modeling is that they were able to get the shifts without neutron capture (they used proton capture). Also, they looked at the question of "unreactive" 61Ni. Apparently one basis for concluding that 61Ni is unreactive in the Ni/H system is the fact that its abundance in the SIMS spectra has not been seen to change in those instances that were analyzed. If this is the basis for the conclusion, I think it could be mistaken. It is also possible that 61Ni is in the middle of a series, and that depletion happens at one end of the series and enrichment at the other, and 61Ni is just a momentary stopping point along the way. In that case, there would be lots of activity (i.e., 61Ni is "reactive"), but neither enrichment or depletion at that point. I used to be focused on proton capture as the source of isotope shifts, and on the possibility of the source of energy being the same as the source of isotope shifts -- that the energy was coming from the Ni+X or Pd+X reactions. Now I suspect that it is not proton capture (or neutron capture), but fast 3He and 4He capture. Note that this would also explain the apparent 2d enrichment noticed by some -- in that case it's just a fast 4He being absorbed by the nearby lattice nucleus. If a reaction runs long enough, you would expect the 3He or 4He capture to pile on -- to see increases of 2*3He or 3*3He, for example, in the Ni/H system. No need to mention for the longtimers that this is all just speculation. Eric
