The positron has an electric charge of +1 e, a spin of 1/2 , and has the same mass as an electron.

 The positron or antielectron is the antiparticle or the antimatter counterpart of the electron.

When a positron collides with an electron, annihilation occurs.

Positrons are produced naturally in β+ decays of naturally occurring radioactive isotopes and in interactions of gamma quanta with matter.

Positron production from radioactive β+ decay can be considered both artificial and natural production, as the generation of the radioisotope can be natural or artificial.

Perhaps the best familiar naturally-occurring radioisotope which produces positrons is potassium-40, a long-lived isotope of potassium which occurs as a primordial isotope of potassium.

 Recent observations indicate black holes and neutron stars produce vast amounts of positron-electron plasma in astrophysical jets.

Large clouds of positron-electron plasma own also been associated with neutron stars.