Calculations that will enable an experimenter to estimate the volume of material viewed by an air-borne gamma-ray spectrometer are presented. The effects of altitude, air density, source density, and gamma-ray attenuation coefficient were investigated. It is shown that the altitude is the most important parameter in the determination of the volume of material that produces a given percentage of the total observed signal.
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Duval et al. (1971) studied this question.
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