(HP-65) Radionuclide Concentration in the Soil

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An extract from Radionuclide Concentration in the Soil from remote spectrometer measurements {green box-View Technical Report (3.42MB)}, DOE, DOI: 10.2172/5935725

Abstract
Spectrometers that remotely sense ..gamma..-rays in the soil are usually oriented with the normal to a planar surface perpendicular to the air-soil interface. When this is the case, and when the thickness of the detector is not greater than the linear dimensions that determine the aforementioned surface area, simple assumptions can be made to calculate high and low limits for factors that convert from photopeak count rates in the spectrometer to soil concentrations. An H.P. 65 calculator program is developed to calculate these two conversion factors as a function of detector altitude, counting rates from a single measurement with a point calibration source, shielding on the surface of the detector, and depth of activity in the soil. The assumption of an exponential decrease with depth allows the previously reported results of Beck et al to be applied to convert from soil concentration to dose rate at 1 m above the ground.
EXHIBIT C
CARD 1 Limiting Values for Radionuclide Concentration in the Soil from Remote Spectrometer Measurements
CARD 2 Limiting Values for Radionuclide Concentration Remote Spectrometer Measurements

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