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Positron Emission

Molecular classification: Nuclear Process, Radioactive Decay

Overview

Positron emission, also known as beta plus decay or β⁺ decay, is a type of radioactive decay in which a proton inside an unstable atomic nucleus is converted into a neutron. This process releases a positron (the antimatter counterpart of the electron) and an electron neutrino (ν_e). The atomic number decreases by one, and transmutation occurs. The emitted positron annihilates with an electron, producing two 511 keV gamma rays, which are detected in PET scans. It is the basis for positron emission tomography (PET), an advanced imaging technique used in medicine.

Other names: Beta Plus Decayβ⁺ Decay

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Cancer (diagnosis/staging)Neurological disorders (brain metabolism)Cardiovascular disease (cardiology)

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Radiation exposure

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