> On Jan 28, 2016, at 12:05, H Veeder <hveeder...@gmail.com> wrote: > > Perhaps the energy of the collapsing bubble is channeled ( with the help of > the dense plasma) into the isotope's nucleus converting it into an unstable > isomer which triggers prompt beta decay.
This is along the lines of what I was thinking, although I wasn't thinking of an isomeric transition. In this particular case, where we have a (double) beta emitter, perhaps, like you say, the dense plasma of electrons is partially channelled through the nucleus. Although the weak interaction has a small cross section, a much higher flux of electrons than usual might compensate. Eric