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The characteristic X-ray radiation is em...

The characteristic X-ray radiation is emitted when

A

the bombarding electrons knock out electrons from the inner shell of the target atoms and one of the outer electrons falls into this vacancy

B

the valance electrons are removed from the target atoms as a result of the collision

C

the source of electrons emits a mono energetic bean

D

the electrons are accelerated to a fixed energy

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A
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