Transcript: The positron is the antiparticle of the electron. Every particle in the zoo of nature has an antiparticle. The positron is positively charged whereas the electron is negatively charged. It has the same mass however. Electrons and positrons if they combine annihilate to form pure energy or gamma rays. The converse process is also possible. Gamma rays can spontaneously form electron-positron pairs. Positrons were first detected in film and bubble chamber experiments where a magnetic field is superimposed in the particle regime such that particles move in the magnetic field. Due to the opposite charge of electrons and positrons they curved in opposite directions in the magnetic fields. In this way antimatter was discovered in the 1930s.