p++Pg+→T−+e++g+
where the collision of photon, Pg+ with p+ reverses tc and tT on p+ changing it into a T− particle that is detected as the electron neutrino. The photon is completely slowed in space to give an g+ particle and, to provide more energy to the collision, a e+ particle is produced also. On the e+ particle, velocity along tg is completely reversed.

The problem with β+ decay is that it normally occurs with the emission of two g+ particles also. For example,
(T+, p+, g+, T+)→(2T+)+2g++e++T−
Only when the p+ particle involved are at the innermost end of the nucleus set, eg.
(p+, g+, T+)→(2g+,T+)+e++T−
does β+ decay not emit the two g+ particle and it would seem that the p+ particle has converted into a g+ particle.
What? Radioactive decays do not involved photons? Maybe.