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Area Nuclear instrumentation: Physical phenomena, basic concepts, instruments, systems, equipment and detectors / Quantities and units

IEV ref 395-01-31

Symbol
Wi

en
mean energy expended per ion pair formed
quotient of E by N ¯ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiqad6eagaqeaaaa@3637@ , where N ¯ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiqad6eagaqeaaaa@3637@ is the mean number of ion pairs formed when the initial kinetic energy E of a charged particle is completely dissipated

W i =E/ N ¯ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiaadEfadaWgaaWcbaGaaeyAaaqabaGccqGH9aqpcaWGfbGaai4laiqad6eagaqeaaaa@3AB8@

Note 1 to entry: This quantity is expressed in joules (J) or electronvolts (eV).

Note 2 to entry: This entry was numbered 393-14-54 in IEC 60050-393:2003.


[SOURCE: ISO 921:1997, definition 60, modified]


fr
perte moyenne d’énergie par paire d’ions formée, <dans une substance> f
quotient de E par N ¯ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiqad6eagaqeaaaa@3637@ , où N ¯ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiqad6eagaqeaaaa@3637@ est le nombre moyen de paires d’ions formées quand l’énergie cinétique initiale E d’une particule chargée est complètement dissipée

W i =E/ N ¯ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiaadEfadaWgaaWcbaGaaeyAaaqabaGccqGH9aqpcaWGfbGaai4laiqad6eagaqeaaaa@3AB8@

Note 1 à l'article: Cette grandeur s'exprime en joules (J) ou en électronvolts (eV).

Note 2 à l'article: Cet article était numéroté 393-14-54 dans la CEI 60050-393:2003.


[SOURCE: ISO 921:1997, définition 60, modifiée]


de
mittlerer Energieaufwand zur Bildung eines Ionenpaares, m

es
energía media perdida por formación de pares de iones, f

it
energia media per coppia di ioni formata

ko
이온쌍 생성당 평균 소요에너지

ja
W値

pl
energia średnia wytwarzania pary jonów, f

pt
perda média de energia por par de iões formado

zh
离子对形成平均消耗能

Publication date: 2014-03
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