The positron or antielectron's the antiparticle or the antimatter counterpart of the electron. The positron has an electric charge of +1, a spin of 1/2, and the same mass as an electron. When a low-energy positron collides with a low-energy electron, annihilation occurs, resulting in the production of two or more gamma ray photons (see electron-positron annihilation). The first scientist deemed to have detected positrons through electron-positron annihilation was Chung-Yao Chao, a graduate stud… (More on Positron)