According to Mills, a specific chemical process he calls "The BlackLight Process" allows a bound electron to fall to energy states below what quantum theory predicts to be possible. In the hydrogen atom, these states are postulated to have an effective radius of 1/p of the ground state radius, with p being limited by the speed of light to a positive integer less than or equal to 137.:31, 207 He terms these below-ground hydrogen atoms 'hydrinos'.
Well, that doesn't seem to look good.
Speculation alert: What about β− decay? According to the Wikipedia, this occurs in neutron rich nucleii. This would be the case if you add 5 neutrons to a Ni58 giving an unstable scenario with Nickel not having a stable isotope at atomic weight of 63. Would adding 1 more neutron to a stable Ni62 trigger beta decay? In this case, the neutron would turn into a proton, releasing an electron and a neutrino. The extra proton transmutes the Ni62 (plus a rogue neutron) into Cu63. This seems plausible because the neutron on its own is unstable. This may not explain the energy release, though.
I remember muons. Maybe they will be helpful in this discussion. But now, I have to update.
Please note that I will take a break until 1pm, local time. From this post, that means 2 hours from now. I need to go get some stuff for lunch and then have lunch. Later!