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2016P QCM14


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Posted
il y a 1 minute, DocMaboul a dit :

Bonjour,

 

quelqu’un peut m’expliquer comment résoudre ce QCM svp?

 

dtzj.jpeg

 

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réponses justes : ABD


Hello !

Coefficient d’atténuation linéique = 0,50 cm, donc CDA = 0,7/0,50 = 1,4 cm !

A) Les photons gamma sont présents dans 0,02% des transformations donc négligeable

B) Oui car > 1,022 MeV

C) 2,8 cm = 2 CDA = 75% d’atténuation

D) 7 cm = 5 CDA = 2^5 = 32, donc facteur d’atténuation 32

E) Cf D

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