Guess What? Radioactivity Defined

Given that a positron decay involves a proton being converted to a neutron (apparent gain in mass) while a small positive charge (positive electric potential) is released.

It is likely that,

the particle on the right with energy oscillating in the $t_c$ time dimension is a negative gravity particle and the particle on left with energy oscillating in the $t_T$ time dimension is a positive gravity particle.

Beta emissions allows for both proton to neutron and neutron to proton change and is not indicative here.  But we see that, when a positive gravity particle is accelerated to light speed, $x\to c$ and $t_g\to0$, it is an electron.  High energy positive gravity particles could be the beta particles detected during radioactive decays.  On the other hand, when a negative gravity particle is accelerated, it becomes like a temperature particle with energy oscillating in $t_c$.

When a positive gravity particle leave the atom, the binding energy at the nucleus due to negative gravity particles remains intact.  There is however an apparent loss in mass.

Just a guess.