electron capture


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e·lec·tron cap·ture

a mode of radioactive disintegration, in which an orbital electron, usually from the K shell, is captured by the nucleus, converting a proton into a neutron with ejection of a neutrino and emission of a gamma ray, and emission of characteristic x-rays as the missing K-shell electron is replaced.
Synonym(s): K capture
Farlex Partner Medical Dictionary © Farlex 2012

e·lec·tron cap·ture

(ē-lektron kapshŭr)
Mode of radioactive disintegration, in which an orbital electron, usually from the K shell, is captured by the nucleus, converting a proton into a neutron with ejection of a neutrino and emission of a gamma ray and emission of characteristic x-rays as the missing K-shell electron is replaced.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Oehme, "Limitations of low resolution mass spectrometry in the electron capture negative ionization mode for the analysis of short- and medium-chain chlorinated paraffins," Analytical and Bioanalytical Chemistry, vol.
From the nuclear physics point of view, we consider the antineutrino absorption on an electron capturing nuclear system leading to a fine resonance in the (N + 1, Z - 1) system, centered 50 keV above the highest excited state reached by the ordinary electron capture. The deexcitation of this resonance will lead to a very characteristic [gamma] ray.
The electron capture rates [U.sub.1] and [U.sub.2] represent electron capture processes associated with capture cross-sections [[sigma].sup.0.sub.n] and [[sigma].sup.+.sub.n], and the rates [U.sub.3] and [U.sub.4] represent electron emission processes.
1) demonstrates that PCBs, as Aroclors and as evident by electron capture detection, are not detectable in the oil.
Shape of the electron capture to the continuum cusps for H, [H.sub.2], and He targets.
Gas chromatography (GC) with electron capture detection provides good sensitivity but lacks specificity (20-22).
After a 5-6 h incubation, [N.sub.2]O production was quantified using a Shimadzu gas chromatograph with an electron capture detector.
These first detectors worked on a technology known as electron capture, which is based on the principle that all explosives have a certain chemical nature (electronegative).
However, metallic As precipitates are neutral and electron capture might not be likely.
More than a decade ago, theorists predicted that the probability of electron capture would increase significantly if such collisions took place in an intense laser beam of an appropriate wavelength.

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