On Thu, Mar 27, 2014 at 8:55 AM, H Veeder <hveeder...@gmail.com> wrote:
Going from D to H should be endothermic. > Exciting slides. I do not have the wherewithal to assess their calorimetry, so I will assume it is accurate. Here are some exothermic reactions involving generation of H from D: - d + 60Ni → 61Ni + p + Q (6.1 MeV) - d + 61Ni → 62Ni + p + Q (8.9 MeV) - d + 62Ni → 63Ni + p + Q (5.1 MeV) - d + 64Ni → 65Ni + p + Q (7.9 MeV) Note that in the authors' back-of-the-envelope calculations using two d+d branches, yielding 4.03 MeV and 3.27 MeV respectively, they came to an expected energy output that was lower than the one they think they observed. So the higher Qs of the above reactions fit that picture nicely. Their slides on the neutron capture cross sections of nickel suggest that they are also looking at thinking about the d+Ni reactions. Regarding the radiation measurements they have not yet reported on -- I will call out a guess that they will report evidence of beta+ and beta- decay. The treated nickel is interesting looking. I assume this is what the nickel looks like prior to a reaction. Note that there is greater occasion for electrically insulated grains after the treatment than before the treatment. Note that the NiD system is quite different than the oft-studied PdD system. I vaguely recall sometime back that proton and deuteron capture are not favorable in palladium, whereas proton capture is favorable in nickel. What is interesting in the above scenario is that we are looking at the possibility not of proton capture but of neutron capture. Eric
