In the post dated 26 Jun 2015, "Guess What? Radioactivity Defined", it was postulated that the emission and absorption of gravity particles are the cause of radioactivity. More accurately, the emission and absorption of gravity particles manifest radioactivity. The cause, are gravity photons that eject gravity particles from a radioactive material.
The arrival of a gravity photon above the threshold frequency triggers the emission of a gravity particle. This is consistent with a Poisson distribution (k=1) for radioactive decay (Exponential decay), where
\(\cfrac{d\,N}{dt}=-\lambda N\)
\(N(t)=N_oe^{-\lambda t}\)
where \(N=N_o\) at \(t=0\)
\(\lambda\) give the average number of gravity photons arriving per second, which can be a very small number (x10-5). We also have, the mean lifetime \(\tau\),
\(\tau=\cfrac{1}{\lambda}\)
and the half life, given by,
\(t_{{1}/{2}}=\tau ln(2)=\cfrac{ln(2)}{\lambda}\)
And we have "photogravitational effect" that is radioactive decay. This has implications in radioactive clean up, if radioactivity can be triggered so.