An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

The transformation of a → radioactive nuclide in which a → beta particle is emitted. In beta minus decay, a → neutron changes into a → proton, → antineutrino, and → electron: n → p + e + ν^-. Beta plus decay involves the conversion of a proton to a neutron, → positron, and → neutrino: p → n + e⁺ + ν.

Beta (β), from → beta particle; → decay.

A collision of a proton with an electron that produces a neutron and an electron neutrino. See → beta decay.

→ inverse; β, letter of Gk. alphabet; → decay.