beta ray

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Related to beta ray: alpha ray

be·ta par·ti·cle

an electron, either positively (positron, β+) or negatively (negatron, β-) charged, emitted during beta decay of a radionuclide.
See also: cathode rays.
Synonym(s): beta ray
Farlex Partner Medical Dictionary © Farlex 2012

beta particle

An ionising electron or positron which is emitted from decaying radioactive nuclei during beta decay or beta emission. Beta particles are equal in mass and charge to electrons.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


Abbreviation for beta.


(β) (bā'tă)
1. Second letter of the Greek alphabet.
2. chemistry Denotes the second in a series, the second carbon from a functional (e.g., carboxylic) group, or the direction of a chemical bond toward the viewer. For terms with the prefix β, see the specific term.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

beta ray

A ray composed of negatively charged electrons expelled from atoms of disintegrating radioactive elements.
Synonym: beta particle
See also: ray
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Beta rays come from an e-beam generator, which provides the same features as gamma radiation but with reduced penetrating power.
Tepco said the level of those that emit beta rays was 230 million becquerels per liter.( ANI )
The company criticised media reports that radiation levels in the tanks were high enough to kill someone in hours if exposed, and said that they mostly gave off beta rays which could be safely deflected, not the more dangerous gamma rays.
By now it was understood that beta rays were streams of speeding electrons (beta particles), while gamma rays were electromagnetic radiation of still shorter wavelength and higher frequency than X rays.
The ocean contains a certain amount of radioactive potassium, which emits beta rays that produce Cherenkov light of their own.
According to Peter Rosen at Los Alamos (N.M.) National Laboratory, the finding is an experimental triumph for scientists, who have been searching for this particular decay scheme--the emission of two electrons (which are known historically as beta rays) and two antineutrinos --for 40 years.
The utility said an estimated 8.85 million becquerels of radioactive substances emitting beta rays, such as strontium-90, have been discharged.
said it detected in the leaked water radioactive substances emitting beta rays, with an extremely high reading of 80 million becquerels per liter, the utility said.