Alpha radiation
a stream of alpha particles.
noun
alpha particles emitted from a radioactive isotope
noun
ionizing radiation consisting of a stream of alpha particles
alpha ray n.
a stream of alpha particles or a single high-speed alpha particle.
alpha ray
a stream of alpha particles.
alpha radiation [(al-fuh)]
particles sent out by some radioactive nuclei, each particle consisting of two protons and two neutrons bound together. alpha particles carry a positive charge. (see beta radiation and gamma radiation.)
note: alpha radiation, unlike gamma radiation, has low penetrating power; it can be stopped by clothing.
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