USE OF NATURAL RADIOACTIVE ELEMENTS FOR DETECTION EFFICIENCY CALIBRATION OF GAMMA SPECTROMETERS

    loading  Checking for direct PDF access through Ovid

Abstract

It is concluded on the basis of measurements performed on preparations of potassium, lanthanum, and uranium using a gamma spectrometer with a detector made of ultrapure germanium that such preparations can be used for calibration with respect to the detection efficiency using the appropriate constants (the half-life, quantum yield, and radionuclide content in the environment). Corrections taking account of the difference in the absorption of γ rays in the materials in the preparations used for the measurements and the calibration source are calculated. For the constants used in the present work to characterize the γ radiation of 234Th (63.3 and 92.6 keV), the measured activity is significantly lower (by 26%) than the value calculated from the mass of the uranium introduced into the experimental preparation (238U is in radioactive equilibrium with 234Th).

Related Topics

    loading  Loading Related Articles