Positroni
Positroni are the antiparticles of electrons. Each positrone carries a positive electric charge equal in magnitude to that of the electron, has the same rest mass as an electron (about 9.11 x 10^-31 kg or 0.511 MeV/c^2), and a spin of 1/2. As antiparticles, positroni are produced in high-energy processes and annihilate with ordinary matter, producing gamma rays.
The positron was predicted by Paul Dirac and discovered experimentally by Carl D. Anderson in 1932 in
When a positrone encounters an electron, they annihilate, typically yielding two gamma photons of approximately 511
Positroni are produced in beta-plus decay (a proton converts to a neutron, emitting a positrone and a
In astrophysics, positrons are observed in cosmic sources and the interstellar medium, contributing to gamma-ray phenomena