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Area Radiology and radiological physics / Dosimetry : general terms, special quantities and units

IEV ref881-12-27

Symbol
K

en
kerma
the quotient of dЕtr by dm, where dЕtr is the sum of the initial kinetic energies of all the charged particles liberated by indirectly ionizing particles in a material of mass dm

K= d E tr dm MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiaadUeacqGH9aqpdaWcaaqaaiaabsgacaWGfbWaaSbaaSqaaiaabshacaqGYbaabeaaaOqaaiaabsgacaWGTbaaaaaa@3CE0@

Note – The SI unit of kerma is the joule per kilogram and is given the special name gray (Gy). The earlier special unit of kerma, still in temporary use, was the rad.

1 Gy = 100 rad = 1 J kg−1


fr
kerma, m
quotient de dЕtr, par dm, dЕtr étant la somme des énergies cinétiques initiales de toutes les particules chargées que libèrent les particules indirectement ionisantes dans un élément de volume d'une substance spécifiée et dm la masse de matière contenue dans cet élément de volume

K= d E tr dm MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiaadUeacqGH9aqpdaWcaaqaaiaabsgacaWGfbWaaSbaaSqaaiaabshacaqGYbaabeaaaOqaaiaabsgacaWGTbaaaaaa@3CE0@

Note – L'unité SI du kerma, joule par kilogramme, a reçu le nom de gray (symbole Gy). L'ancienne unité particulière du kerma, encore utilisée temporairement, est le rad.

1 Gy = 100 rad = 1 J kg−1


ar
كيرما كمية الطاقة الحركية المنتشرة في المادة

es
kerma

it
kerma

ko
커마

ja
カーマ

pl
kerma

pt
kerma

sv
kerma

Publication date: 1983-01
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