Positron
Positron
Positron (/pɒzɪtrɒn/), also known as the antielectron, is the antiparticle or the antimatter counterpart of the electron. The positron has an electric charge of +1e, a spin of 1/2, and has the same mass as an electron. When a low-energy positron collides with a low-energy electron, annihilation occurs, resulting in the production of two or more gamma ray photons.
Etymology
The term "positron" was coined by Carl David Anderson in 1932, during his discovery of the particle. The name is a combination of "positive" and "electron", indicating its positive charge in contrast to the negative charge of an electron.
Related Terms
See Also
External links
- Medical encyclopedia article on Positron
- Wikipedia's article - Positron
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