Concept information
Preferred term
alpha decay
Definition(s)
- Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two. An alpha particle is identical to the nucleus of a helium-4 atom, which consists of two protons and two neutrons. It has a charge of +2 e and a mass of 4 u. For example, uranium-238 decays to form thorium-234 (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Alpha_decay)
Broader concept(s)
Synonym(s)
- α-decay
In other languages
-
French
-
désintégration α
-
radioactivité alpha
-
radioactivité α
URI
http://data.loterre.fr/ark:/67375/MDL-ZN7HS1SM-V
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