This is a potential fusion fuel mix commonly floated by the fusion community. It is superior to the deuterium/deuterium and deuterium/tritium fuel mixes used in current experimental fusion reactors because it does not produce neutrons. However, it requires higher energies, and He3 is very rare on Earth.

The reaction products are as follows:
helium-4 (alpha particle) at 3.6 MeV and
proton at 14.7 MEV

These numbers are drawn from the NRL Plasma Physics Formulary, put out by the Naval Research Laboratory.

The wide spread in product energies makes it difficult to directly extract the reaction eneergy to electricity.