Eric-- Whoever wrote the Wikipedia item you reference does not appear to understand the difference between spin of 3/2+ and 3/2-. The statement about the spin of Ni-61 is incorrect.
Bob ----- Original Message ----- From: Eric Walker To: [email protected] Sent: Tuesday, September 09, 2014 11:30 PM Subject: Re: [Vo]:Rossi on Ni62 I wrote: About the beta-delayed gamma -- it's not clear that the 63Ni* gamma decay is a beta-delayed gamma in this instance (see the decay in [1]). But as you know beta-delayed gammas are a frequent occurrence. The half-life of the beta decay in this case is 100 years, so if there is beta-delayed gamma emission, the activity would be significant. The excited state after a beta- decay would be in the daughter (63Cu) not the parent (63Ni). I don't see any evidence for a 63Cu* excited state. You are probably right. Embarrassing rookie error on my part. Eric
