I think a little mass lead, for example. will pretty well shield the 511 ev x-rays coming from Beta+/electron annihilation. Rossi had such shielding in his earlier E-Cat design.
Bob ----- Original Message ----- From: Teslaalset To: [email protected] Sent: Sunday, March 23, 2014 7:12 AM Subject: Re: [Vo]:My current views on the 'Rossi's process' Eric, on the little info I could find in public domain, I understand that ß+ decay happens within the nucleus. Are you saying that there are quite some exceptions? On Sat, Mar 22, 2014 at 7:10 AM, Eric Walker <[email protected]> wrote: On Fri, Mar 21, 2014 at 7:54 AM, Teslaalset <[email protected]> wrote: 1.. The ß+ decay energy of Cu(x) > Ni(x) + e+ + ve (2 -4 MeV) of each decay step in the chain, causing the Ni/Cu powder to heat up. I think the electron-positron annihilation photons from the radioactive decay of certain isotopes of nickel would escape the system. Since the mean free path of these photons is long, they would be unlikely to thermalize, unless some sort of 100 percent efficiency gamma thermalization mechanism is at play. (Only handfuls of gammas are typically seen.) Eric
