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Home > Positron emission

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 Carbon-11 , Nitrogen-13, Oxygen-15 and Fluorine-18 ; for example:

These isotopes are used in positron emission tomography.

See also

• Beta decay

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Topics: Positron Emission Beta Decay Isotopes Force Neutron Oxygen-15...

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Positron emission tomographyPositron emission tomography (PET is a nuclear medicine medical imaging technique which produces a three dimensional image or map of functional processes in the body. Description A short-lived radioactive tracer isotope which decays by emitting a positron PositronA positron is the antiparticle of the electron. It is antimatter, has an electric charge of +1, a spin of 1/2, and the same mass as an electron. When a positron annihilates with an electron, their mass is converted into energy in the form of two gamma ray PositroniumPositronium is a quasi-stable system consisting of a positron and an electron bound together into an " exotic atom. Its set of energy levels is similar to that of the hydrogen atom (electron and proton). However, because of the different reduced mass, the Positronic brainA positronic brain is a fictional technological device, originally conceived by science fiction writer Isaac Asimov. Its role is to serve as a central computer for a robot, and, in some unspecified way, to provide it with a form of consciousness recognisa Positron emissionPositron 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 positr Positron electron annihilation reactionThe positron electron annihilation reaction refers to the physical phenomena of a positron particle (the physical opposite of an electron), generated by a beta decay and slowed to "thermal speeds", and combines/reacts with an electron. The two particles c Positron emission tomography scanner