NT & RP Journal
THE DEPENDENCE OF Ge DETECTORS EFFICIENCY ON THE DENSITY OF THE SAMPLES IN GAMMA-RAY SPECTROMETRY
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Vol. XXII, No. 2, Pp. 1-72
December 2007
UDC 621.039+614.876:504.06
ISSN 1451-3994

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Pages: 58 - 63

Authors: Ivana VUKAŠINOVIĆ, Dragana TODOROVIĆ, Dragana POPOVIĆ

Abstract

The effect of the density of environmental samples on the counting efficiency of Ge detectors used in gamma-spectrometry was studied. The dependence eff(r) was determined for two HPGe detectors (relative efficiencies 18% and 20%), using five radioactive standard reference materials (silicone resins, epoxy resin, milk powder, soil) with different matrix densities (0.45-1.22 g/cm3) in Marinelli beakers (V = 500 cm3). The dependence of efficiency vs . density was found to be linear and the regression parameters for energies in the range of 60-2000 keV were determined, too. The effect of variation in density on the counting efficiency of Ge detectors is dominant in the range of lower energies (60-600 keV) and decreases with energies in the higher energy range.

Key words: gamma-spectrometry, counting efficiency, environmental samples, Ge detector

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Vinča Institute of Nuclear Sciences :: Designed by milas :: July 2007
Last updated on September, 2010