alpha emission
1alpha emission — noun A form of radioactivity in which alpha particles are emitted from the nucleus of an atom See Also: alpha emitter …
2Alpha decay — 2 less. For example:(The second form is preferred because the first form appears electrically unbalanced. Fundamentally, the recoiling nucleus is very quickly stripped of two electrons to neutralize the ionized helium cation.)An alpha particle is …
3alpha decay — Physics. a radioactive process in which an alpha particle is emitted from the nucleus of an atom, decreasing its atomic number by two. [1935 40] * * * Type of radioactive disintegration (see radioactivity) in which some unstable atomic nuclei… …
4alpha emitter — noun a radioactive substance that decays by emitting alpha particles See Also: alpha emission …
5alpha — [ alfa ] n. m. • XIIe; mot gr. 1 ♦ Première lettre (α) de l alphabet grec. Alpha privatif, qui donne, dans les composés grecs, une valeur négative. ♢ Fig. (expr. de l Apocalypse, en parlant de Dieu) L alpha et l oméga : le commencement et la fin …
6Emission de neutron — Émission de neutron L émission de neutron est la réaction (radioactive) par laquelle un isotope (instable) perd (spontanément) un neutron, le poids atomique diminue de un et le numéro atomique est conservé. Par exemple 4H se transforme en 3H.… …
7Alpha — may refer to:The Greek letter alphaAlpha (letter), a letter in the Greek alphabet. α may be used as the symbol for: *Alpha channel, describing transparency and opacity in computer graphics *Angle of attack in aerodynamics *Common base current… …
8Alpha particle — Alpha particles (named after and denoted by the first letter in the Greek alphabet, α) consist of two protons and two neutrons bound together into a particle identical to a helium nucleus; hence, it can be written as He2+ or 42He2+. They are a… …
9Alpha Ara — Alpha Arae Choo (α Arae) Données d observation (Époque J2000.0) Ascension droite 17h 31m 50.5s Déclinaison 49° 52′ 34″ Constellation Autel Magnitude apparente …
10alpha decay — noun radioactive decay of an atomic nucleus that is accompanied by the emission of an alpha particle • Hypernyms: ↑decay, ↑radioactive decay, ↑disintegration * * * noun : the radioactive decay of an atomic nucleus by emission of an alpha particle …
