On Sun, Mar 23, 2014 at 7:12 AM, Teslaalset <robbiehobbiesh...@gmail.com>wrote:
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? > Perhaps Robin or Bob can correct me if I'm wrong, but I think the way beta-plus decay works is that the unstable nucleus emits a positron during the transition to the daughter. The positron does something of a random walk around the (extra-nuclear) environment until it encounters an electron, at which point you get the annihilation and resulting 511 keV photon pair (each going off in opposite directions). Eric
