A positron or otherwise known as ‘antielectron’ is the antimatter or antiparticle version of the electron. It has the same mass and magnitude of charge as the electron. When a positron collides with an electron, annihilation occurs. If this collision occurs at low energies, it results in the production of two or more gamma ray photons. The first positron was discovered by Carl David Anderson in cloud-chamber studies of the composition of cosmic rays. A positron can be emitted in the positive beta decay of proton-rich (neutron-deficient) radioactive nuclei and are formed in pair production, in which the energy of a gamma ray in the field of a nucleus is converted into an electron-positron pair. Positrons emitted from man-made radioactive sources are used in medical diagnosis in the technique known as positron emission tomography (PET).
Here at MathsOne, one of the Best Tuition Centres in Kerala we educate our students in these subatomic particles and therefore broaden their horizons.