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Area Radiology and radiological physics / Ionizing radiations : quantities and units

IEV ref881-04-32

Symbol
μ tr ρ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaamaabmaabaWaaSaaaeaacqaH8oqBdaWgaaWcbaGaaeiDaiaabkhaaeqaaaGcbaGaeqyWdihaaaGaayjkaiaawMcaaaaa@3C7F@

en
mass energy transfer coefficient (of a material for indirectly ionizing particles)
the quotient of dEtr/EN by ρ dl, where EN is the energy of each particle (excluding rest energy), N is the number of particles, and dEtr/EN is the fraction of incident particle energy that is transferred to kinetic energy of charged particles by interactions in traversing a distance dl in the material of density ρ

μ tr ρ = 1 E N ρ d E tr dl MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaamaalaaabaGaeqiVd02aaSbaaSqaaiaacshacaGGYbaabeaaaOqaaiabeg8aYbaacqGH9aqpdaWcaaqaaiaaigdaaeaacaWGfbWaaSbaaSqaaiaad6eaaeqaaOGaeqyWdihaaiabgwSixpaalaaabaGaaeizaiaadweadaWgaaWcbaGaciiDaiaackhaaeqaaaGcbaGaaeizaiaadYgaaaaaaa@4865@

Note – For a given monoenergetic radiation, the relationship between kerma (K) and energy fluence (Ψ) may be written

K=Ψ μ tr ρ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiaadUeacqGH9aqpcqqHOoqwdaWcaaqaaiabeY7aTnaaBaaaleaaciGG0bGaaiOCaaqabaaakeaacqaHbpGCaaaaaa@3E5F@


fr
coefficient de transfert d'énergie massique (d'un matériau pour des particules indirectement ionisantes) m
quotient de dEtr/EN par le produit de ρ dl où dEtr/EN est la fraction des énergies des particules incidentes, à l'exclusion des énergies au repos, des particules indirectement ionisantes qui traversent sous une incidence normale une couche d'épaisseur dl d'une substance de masse spécifique ρ et dEtr la somme des énergies cinétiques de toutes les particules chargées libérées de cette couche

μ tr ρ = 1 E N ρ d E tr dl MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaamaalaaabaGaeqiVd02aaSbaaSqaaiaacshacaGGYbaabeaaaOqaaiabeg8aYbaacqGH9aqpdaWcaaqaaiaaigdaaeaacaWGfbWaaSbaaSqaaiaad6eaaeqaaOGaeqyWdihaaiabgwSixpaalaaabaGaaeizaiaadweadaWgaaWcbaGaciiDaiaackhaaeqaaaGcbaGaaeizaiaadYgaaaaaaa@4865@

Note – Pour un rayonnement monoénergétique, la relation entre le kerma (K) et la fluence énergétique (Ψ) peut s'exprimer comme suit:

K=Ψ μ tr ρ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiaadUeacqGH9aqpcqqHOoqwdaWcaaqaaiabeY7aTnaaBaaaleaaciGG0bGaaiOCaaqabaaakeaacqaHbpGCaaaaaa@3E5F@


ar
معامل نقلِ طاقة الكتلة لمادة (لجسيمات غير مباشرة التأين)

es
coeficiente másico de transferencia de energía (de un material para partículas indirectamente ionizantes)

it
coefficiente massico di trasferimento di energia

ko
질량 에너지 전이 계수, 간접 이온화 입자체

ja
質量エネルギー転移係数

pl
masowy współczynnik przekazania energii

pt
coeficiente mássico de transferência de energia (de um material para partículas indirectamente ionizantes)

sv
massenergiöverföringskoefficient

Publication date: 1983-01
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