In reply to Axil Axil's message of Wed, 28 May 2014 15:22:28 -0400: Hi, [snip] >More > >http://en.wikipedia.org/wiki/Electron_capture > >This is a special sort of radioactive decay mode when there is an large >imbalance of protons and neutrons in the nucleus. > >In this case, a gamma from a secondary positron decay will be present.
In the case of electron-capture there is no positron created, and hence there can't be an gammas from positron decay. However where both electron capture and beta+ decay are possible, sometimes the one and sometimes the other will occur. The beta+ (positron) decay will then obviously result in production of a pair of gammas when the positron annihilates an electron. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
