| alpha particle |
a positively charged particle that is the nucleus of the helium atom; emitted from natural or radioactive isotopes
출처: wordnet.princeton.edu/perl/webwn
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| alpha particle |
a positively charged particle ejected from the nucleus of a radioactive atom, being a high-speed ionized atom of helium. A stream of these particles constitutes alpha rays.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| alpha particle |
(Or -particle; symbol 2 He 4 .) Physically indistinguishable from the nucleus of a helium atom
출처: amsglossary.allenpress.com/glossary/browse
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| alpha particle |
A particle consisting of two protons and two neutrons, produced during alpha decay. Identical to the nucleus of a 4He atom.
출처: www.palaeos.com/Geochronology/gcglossary.html
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| alpha particle |
A positively charged particle, consisting of two neutrons and two protons, emitted by certain radioactive materials. Alpha particles can travel only a few inches in the air and lose their energy almost as soon as they collide with anything. They are easily shielded by a sheet of paper or the outer layer of a person
출처: www.nsc.org/ehc/guidebks/wippglos.htm
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