| alpha particle |
Particle emitted in certain types of radioactive decay. It is positively charged and made up of two neutrons and two protons (which is a helium atom nucleus.) It is easily stopped, and cannot penetrate a piece of paper or the skin.
출처: www.pbs.org/wgbh/pages/frontline/shows/reaction/et...
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| alpha particle |
A radioactive particle equivalent to a helium nucleus (2 protons, 2 neutrons)
출처: misterguch.brinkster.net/vocabulary.html
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| alpha particle |
A helium nucleus made up of two neutrons and two protons. An alpha particle can be stopped in a piece of paper a few microns thick. It produces substantially more ions than an x ray or gamma ray or an electron and, therefore, the potential for cellular damage is greater.
출처: www.hc-sc.gc.ca/hecs-sesc/ccrpb/publication/safety...
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| alpha particle |
A 4 He nucleus. It is made up of two neutrons and two protons. It is the least penetrating of the three common forms of radiation, being stopped by a thin sheet of paper. It is not dangerous to living things unless the alpha-emitting substance is inhaled or ingested or comes into contact with the lens of the eye.
출처: www.lbl.gov/abc/wallchart/glossary/glossary.html
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| alpha particle |
A positive particle consisting of 2 protons and 2 neutrons. It is the nucleus of a helium atom.
출처: history.nasa.gov/EP-95/glossary.htm
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