alpha emission


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Related to alpha emission: gamma emission, Beta emission

alpha emission

[′al·fə i′mish·ən]
(nuclear physics)
Ejection of alpha particles from the atom's nucleus.
References in periodicals archive ?
As the two Voyager probes moved farther and farther from the Sun-from 1993 to 2003, they travelled between six and 13 billion kilometers (40 to 90 Astronomical Units) from the Sun-the glow of local Lyman alpha emissions in the vicinity of the probes has become easier to detect, growing 20 times more intense than if observed from Earth orbit.