On Sun, Oct 25, 2015 at 12:56 PM, Bob Higgins <[email protected]> wrote:
Regarding electrons and positrons in particular, Hotson rightly points out > that these two particles are fermions. As fermions, they are forbidden to > be in the same place at the same time, and so cannot annihilate. Instead of > annihilation, they fall into orbit around each other. When (if) they reach > a DDL orbit, the become a part of Dirac's negative energy sea. > If positrons and electrons do not annihilate, where do the two oppositely-travelling 511 keV photons come from as a result of the activity of beta plus emitters? (Note that 511 keV is the mass of an electron or positron.) Eric
