Not science fiction, but science fact. It’s Something that happens in a type of beta decay. From the Encyclopedia Britannica:

Certain nuclei have a higher-than-ideal ratio of protons to neutrons and may adjust the proportion by the reverse process, a proton being converted into a neutron with the expulsion of a positron and an antineutrino.

Retired Navy. Inveterate contrarian. If I haven’t done it, I’ve usually done something close.

Retired Navy. Inveterate contrarian. If I haven’t done it, I’ve usually done something close.