Robin FYI, > If you look at http://atom.kaeri.re.kr/cgi-bin/decay?Ni-59%20EC you will see that the decay of Ni-59 involves electron capture
Correct - as I had already mentioned. > (with no visible signature because the energy is all carried by the neutrino) 99996.3 times out of 100000. The remaining 3.7 times out of 100000 it goes as positron decay. What? EC does leave a definite signature. Where did you get the "no visible signature"? The captured electron comes from an inner orbital and there is an Auger Cascade which follows. An Auger cascade is actually a more recognizable signature than beta decay. Jones
