An Investigation into Gamma Rays and the Inverse Square Law.

... An Investigation into Gamma Rays and the Inverse Square Law. Introduction: As with any radiation source, the radiation emitted spreads out from the origin (the point source). Although the gamma source to be used is not strictly a point source it is a fair approximation of one and will be sufficient for use in this experiment. The intensity of the radiation diminishes with the square of the distance if there is no absorption by the medium. Gamma radiation is absorbed by air molecules but may be considered negligible. Background Information and Research: * Supplied by the centre for non-destructive evaluation, Iowa state university, Ames, IA- -Newton's inverse square law: Any point source, which spreads its influence equally in all directions without a limit to its range, will obey the inverse square law. The intensity of the influence at any given radius(r) is the source strength divided by the area of the sphere. Being strictly geometric in

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