On Mon, Sep 28, 2015 at 5:31 PM, <mix...@bigpond.com> wrote: ...However I does raise an interesting possibility. Might 2 radioactive > nuclei > utilize pion exchange to both become stable? >
Yet another possibility -- the pion exchange happens simultaneously with the decay of the light isotope to stable daughters, so that the entire thing is exothermic and yields a stable outcome. I suppose it would all need to happen in a single step to work out energetically. Eric