Positron Definition

A positron can leave particle tracks in a bubble chamber.
A positron can leave particle tracks in a bubble chamber. MEHAU KULYK/SCIENCE PHOTO LIBRARY / Getty Images

Positron Definition: A positron or antielectron is the antimatter counterpart to an electron. A positron has the same mass as an electron and a spin of 1/2, but it has an electrical charge of +1. When a positron collides with an electron an annihilation occurs which results in the production of two or more gamma ray photons.

Also Known As: antielectron

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Helmenstine, Anne Marie, Ph.D. "Positron Definition." ThoughtCo, Jul. 24, 2017, thoughtco.com/definition-of-positron-605913. Helmenstine, Anne Marie, Ph.D. (2017, July 24). Positron Definition. Retrieved from https://www.thoughtco.com/definition-of-positron-605913 Helmenstine, Anne Marie, Ph.D. "Positron Definition." ThoughtCo. https://www.thoughtco.com/definition-of-positron-605913 (accessed May 24, 2018).