Hi Bob, Regarding the existence of the reaction, please see:
https://www-nds.iaea.org/exfor/servlet/X4sSearch5?reacc=28-NI-62(D%2CP)28-NI-63%2C%2CDA https://www-nds.iaea.org/exfor/servlet/X4sSearch5?reacc=28-NI-62(D%2CP)28-NI-63%2CPAR%2CDA%2C%2CREL https://www-nds.iaea.org/exfor/servlet/X4sSearch5?reacc=28-NI-62(D%2CP)28-NI-63%2CPAR%2CDA The differential cross sections have been obtained, so I assume it is not a theoretical reaction. The mass excess is 5.1 MeV, so it is exothermic. High energy photons have been reported coming from at least one nickel+H2O system; Ed Storms mentions one electrolysis experiment in passing on p. 84 of his new book. (I'm not sure what the energies were in that case.) Note also that in the interview provided by Bob Higgins, Focardi mentioned that they were using lead shielding at one point to shield "gammas" (perhaps high energy x-rays). There would obviously be an incentive to be discrete about something like this if one's target segment is the consumer market. I assume the removal of a nickel isotope would be quite expensive. Perhaps it would be easier to go with a preparation with a single isotope enriched rather than attempt to select out a specific isotope. About the beta-delayed gamma -- it's not clear that the 63Ni* gamma decay is a beta-delayed gamma in this instance (see the decay in [1]). But as you know beta-delayed gammas are a frequent occurrence. The half-life of the beta decay in this case is 100 years, so if there is beta-delayed gamma emission, the activity would be significant. I'm not saying this is what is going on; just that it's a possibility. Eric [1] http://en.wikipedia.org/wiki/Isotopes_of_nickel On Tue, Sep 9, 2014 at 10:14 PM, Bob Cook <[email protected]> wrote: > Eric-- > > I do not think the reaction of the d,p variety occurs. There are not > 87,000 Ev gammas reported, which would be evident as you suggest. I do not > think Ni-63 is involved in the production of Cu-63. Ni-62 removal would be > expensive for Rossi. > > Bob > > > ----- Original Message ----- > *From:* Eric Walker <[email protected]> > *To:* [email protected] > *Sent:* Tuesday, September 09, 2014 8:56 PM > *Subject:* Re: [Vo]:Rossi on Ni62 > > On Tue, Sep 9, 2014 at 6:14 PM, Bob Cook <[email protected]> wrote: > > I wonder if the new Cu is Cu-63? Rossi may be implying that Ni-62 goes to >> Cu-63, both of which are stable isotopes. Spin coupling to get rid of the >> 6.22Mev of excess mass may be the answer--there are no gammas apparently. >> > > In a 62Ni(d,p)63Ni reaction, the 63Ni will beta- decay to 63Cu. The > proton will have ~ 5 MeV and will excite 11 keV electrons, which can easily > be shielded. There will be a delayed gamma emission after the beta- decay > of Q=87 keV, however, which will not be fully shielded even by 1cm of lead. > If there is vigorous deuteron stripping, there will be a lot of motivation > to remove 62Ni from the nickel. > > Eric > > >
