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inverse square law gamma radiation physics

How efficient is a Geiger Muller at detecting gamma radiation?
Reply 1
Avatar for Rexar
Rexar
11
Not very
bad
Original post by Rexar
Not very


why?
Original post by LisaNikita
bad

why?
Reply 5
Avatar for Rexar
Rexar
11
Gamma is weakly ionising so is not likely to ionise when it passes through the tube. The tube uses the principle of ionisation to detect radiation so won't detect much gamma
However this can be accounted for. If you know background should be, say, 40 events per second, but you only detect 5, then you know that your detector measure's an eighth of the true value.

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