Positron emission
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Nuclear processes

Radioactive decay processes Alpha decay Beta decay Electron capture Gamma radiation Neutron emission Positron emission Proton emission Spontaneous fission Nucleosynthesis Neutron Capture The R-process The S-process Proton capture: The P-process

Positron emission is a type of beta decay, referred to as "beta plus" (β⁺). In beta plus decay, a proton is converted to a neutron via the weak nuclear force and a beta plus particle (a positron) and a neutrino are emitted. Isotopes which emit positrons include C-11, N-13, O-15 and F-18; for example:

These isotopes are used in positron emission tomography.

See also Beta decay

The original article can be found at: http://en.wikipedia.org/wiki/Positron_emission.
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