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

IEV ref881-04-53

Symbol
Γδ

en
air kerma-rate constant
for a radionuclide emitting photons, the quotient of l 2 K ˙ δ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiaadYgadaahaaWcbeqaaiaaikdaaaGcceWGlbGbaiaadaWgaaWcbaGaeqiTdqgabeaaaaa@39DC@ by A, where Kδ is the air kerma-rate due to photons of energy greater than δ, at a distance 1 from a point source of this nuclide having an activity A

Γ δ = l 2 K ˙ δ A MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiabfo5ahnaaBaaaleaacqaH0oazaeqaaOGaeyypa0ZaaSaaaeaacaWGSbWaaWbaaSqabeaacaaIYaaaaOGabm4sayaacaWaaSbaaSqaaiabes7aKbqabaaakeaacaWGbbaaaaaa@3F05@

Note – The SI unit of air kerma-rate constant is m2 • J • kg−1.

When the special names gray (Gy) and becquerel (Bq) are used m2 • J • kg−1 becomes m2 • Gy • Bq−1 • s−1.

When the earlier special units of activity (the curie) and kerma (the rad) are used

1rad  m 2 Ci 1 s 1 = 10 12 3,7 m 2 J kg 1 ( exactly )


fr
constante de débit de kerma dans l'air, f
pour un radionucléide émetteur de photons, quotient de l 2 K ˙ δ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiaadYgadaahaaWcbeqaaiaaikdaaaGcceWGlbGbaiaadaWgaaWcbaGaeqiTdqgabeaaaaa@39DC@ par A, où Kδ est le débit de kerma dans l'air dû aux photons d'énergie supérieure à une distance l d'une source ponctuelle de ce nucléide d'activité A

Γ δ = l 2 K ˙ δ A MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiabfo5ahnaaBaaaleaacqaH0oazaeqaaOGaeyypa0ZaaSaaaeaacaWGSbWaaWbaaSqabeaacaaIYaaaaOGabm4sayaacaWaaSbaaSqaaiabes7aKbqabaaakeaacaWGbbaaaaaa@3F05@

Note – L'unité SI de la constante de débit de kerma dans l'air est exprimée en m2 • J • kg−1.

Quand on utilise le gray (Gy) et le becquerel (Bq), m2 • J • kg−1 devient m2 • Gy • Bq−1 • s−1.

Le curie et le rad peuvent être utilisés temporairement pour l'expression de la constante de débit de kerma dans l'air:

1rad  m 2 Ci 1 s 1 = 10 12 3,7 m 2 J kg 1 ( exactement ) MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaiqaciWaamGadaGadeaabaGaaqaaaOqaaiaaigdacaaMc8UaaG PaVlaaykW7caqGYbGaaeyyaiaabsgacqGHflY1caqGGaGaaeyBamaa CaaaleqabaGaaGOmaaaakiabgwSixlaaboeacaqGPbWaaWbaaSqabe aacqGHsislcaaIXaaaaOGaeyyXICTaae4CamaaCaaaleqabaGaeyOe I0IaaGymaaaakiabg2da9maalaaabaGaaGymaiaaicdadaahaaWcbe qaaiabgkHiTiaaigdacaaIYaaaaaGcbaGaaG4maiaacYcacaaI3aaa aiaaysW7caqGTbWaaWbaaSqabeaacaaIYaaaaOGaeyyXICTaaeOsai abgwSixlaabUgacaqGNbWaaWbaaSqabeaacqGHsislcaaIXaaaaOWa aeWaaeaacaqGLbGaaeiEaiaabggacaqGJbGaaeiDaiaabwgacaqGTb Gaaeyzaiaab6gacaqG0baacaGLOaGaayzkaaaaaa@6BE7@ .


ar
ثابت معدل كيرما في الهواء

es
constante de tasa de kerma en el aire

it
costante di rateo di kerma in aria

ko
공기 커마율 상수

ja
空気カーマ率定数

pl
stała mocy kermy w powietrzu

pt
constante de taxa de kerma no ar

sv
kermaratkonstant

Publication date: 1983-01
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