alpha decay

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Related to Alpha emission: gamma emission, Beta emission

alpha decay

n.
The radioactive decay of an atomic nucleus by emission of an alpha particle.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

alpha decay

n
(General Physics) the radioactive decay process resulting in emission of alpha particles
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.alpha decay - radioactive decay of an atomic nucleus that is accompanied by the emission of an alpha particlealpha decay - radioactive decay of an atomic nucleus that is accompanied by the emission of an alpha particle
radioactive decay, disintegration, decay - the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
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References in periodicals archive ?
"In the last several years, we've learned that the gaseous halos surrounding galaxies glow with a particular ultraviolet wavelength called Lyman alpha emission," Dawn Erb, the lead author of the work, said in a (https://www.eurekalert.org/pub_releases/2018-07/wmko-ygh072418.php) statement .
A reproducible and constant massic rate, attributed to the alpha emission, was obtained for each measurement trial on subtracting this lower energy region from the total spectrum.
The pay loads include Lyman Lpha Photometer to measure the relative abundance of deuterium and hydrogen from Lyman- alpha emission; Methane Sensor for Mars to measure methane in the Martian atmosphere, and thus determine past existence of life; Mars Colour Camera to capture images and information about the surface of Mars and its composition; Mars Exopheric Neutral Composition Analyser, which is a spectrometer; and Thermal Infrared Imaging Spectrometer to map surface composition and mineralogy of Mars.
Both [.sup.214]Pb and [.sup.210]Pb contribute to alpha emission, with [.sup.210]Pb being the primary source due to its considerably longer half life (see Figure 2 online).