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The experiment: I'm counting Gamma and beta rays emitted from gamma and beta cylindrical sources, for counting I'm using a simple GM counter, which has nearly the same cylindrical shape (i mean diameter).

As we all know this are electromagnetic emissions, so they distance must obbey an inverse square law.

The problem: When I make the analysis of the data i don't get a -2 in the power of the distance, but a -1.48 exactly all the times. I'm guessing the problem is that the inverse square law applies for puntual emission, not for a "cylindrical" emission, as the one i'm using.

¿How can I solve the problem? I'm trying to get some geometrical factor that might let me get the inverse square law, but i'm not sure. If anyone knows, i'd love to listen.

P.D.: Greetings from Colombia

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# Emission of Gamma and Beta rays : Experimental Problem

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