I had in mind atomic mass (i.e., nuclides in the neighborhood of zirconium). I got this tidbit from Wikipedia (second paragraph):
https://en.wikipedia.org/wiki/Spontaneous_fission I have now added a reference to this page in the paper. Wikipedia shows "(SF)" in some cases for isotopes in this range, e.g., in the table on the righthand side for niobium: https://en.wikipedia.org/wiki/Niobium I think this means, "theoretically there could be spontaneous fission, but it hasn't been observed." I've also been assuming that this is also the approximate threshold for the start of fragmentation reactions. Eric On Tue, Dec 8, 2015 at 3:53 PM, <[email protected]> wrote: > In reply to Eric Walker's message of Mon, 7 Dec 2015 22:20:18 -0600: > Hi Eric, > > In the sentence "Spontaneous fission becomes energetically possible at > atomic > masses greater than 92." > Do mean "masses" or "numbers". IOW are you talking about Uranium and up, or > upward of about Zirconium? > > >For those who have had the patience to follow the argument this far, here > >is a paper that goes into further detail on the general idea: > > > >https://drive.google.com/open?id=0BzKtdce19-wySFBVLXJET3k2TlU > > > >There should be a "download" link at the top that will allow it to be > >downloaded as a PDF. I am particularly happy with the appendix. > > > >Eric > [snip] > Regards, > > Robin van Spaandonk > > http://rvanspaa.freehostia.com/project.html > >
