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qcm 7 session 1 2021 2022


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image.png.d3da241e3262ba61583b703c3a256ec5.png

 

bonjour, je ne comprends pas pourquoi la question 7 D est comptée vraie et pourquoi ce n'est pas plutôt 142 kev, à quoi correspondent ces 2 kev entre ?

merci!!

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  • Solution
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Salut, 

Entre 142 keV et 140 keV tu as un plateau (il est assez fin), les photon gamma ne sont émis qu'à partir de là donc ont une énergie de 140 keV ;)

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