As I have posted before in the thread “Variability in cold fusion”, we are not dealing with a black or white condition; no, it is more likely a gray situation with many gradations in shade.
The weaker, the cold fusion reaction is; the weaker that the coulomb barrier lowering is; the greater the probability for the generation of radioactive isotope production will be. In the Piantelli experiments, he sees 6 MeV protons coming out of the nickel. This tells me that his LENR reaction is very weak with relatively little coulomb barrier lowering if any. The Piantelli theory that a negative hydrogen ion penetrates the nucleus as a neutral particle my well be true and no coulomb barrier lowering is in fact happening. My conclusion, the amount of radioactive byproducts produced by the reaction,,, that are found in the ash… tells us how vigorous the coulomb barrier lowering is in that reaction. Cheers: Axil On Sat, Jul 14, 2012 at 4:06 PM, Eric Walker <[email protected]> wrote: > On Sat, Jul 14, 2012 at 12:33 PM, Axil Axil <[email protected]> wrote: > > But many isotopes are stable and in LENR all resultant isotopes are >> always stable; They are never radioactive. The Bumpy road holds still. >> > > Tritium is radioactive. But I think Robin speculated that that might be > due to a secondary fissioning of neutron-heavy nuclei rather than the > primary LENR reaction. > > I just looked at a table summarizing thirteen studies in which isotope > shifts were seen (courtesy of Ed Storms's LENR book). There were maybe ten > to twenty different isotopes seen between the different studies. Only two > of the isotopes were highly radioactive -- beryllium-11 and titanium-40. > The rest were stable or observationally stable or had a half-life of 10^9 > years. The interesting thing is that there were both increases and > decreases reported, and both were of relatively stable isotopes. > > Two studies reported transitions to highly radioactive species; > beryllium-11 in one case and titanium-40 in the other. Both studies shared > at least one collaborator, and the large number of shifts in one of the > studies leads me wonder about contamination, although this is obviously not > my area of expertise. > > These details give reason to think that you're right that shifts involve > stable isotopes. I will be following the question of unstable isotopes > more closely now. Jones made this point about isotopes sometime back, and > I didn't appreciate that tritium might be a special case. > > Eric > >
