Study on Monte-Carlo calculation of peak efficiencies of the superpure Hp Ge detector (Gmx) in environmental gamma spectrometry with using MCNP4C2
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Abstract
Abstract. Monte-Carlo modeling allows calculating the detector eĩíìciency in gamma
spectrometry of environmental samples with taking into consideration both the photon self-
absorption in sample itself and absorption in all other materials between the sample and the
dctector’s active part. In this paper, the peak efficiencies of the Hp Ge detector (GMX) for
gammas at v a r i o u s e n e r g i e s (emitted isotropically from the S t a n d a r d disk source and v o l u m e t r i c
source - environmental sample, in which the different radionuclides are present) are calculated
based on MCNP4C2-Monte-Carlo multi-purpose radiation transport code system developed in the
Los-Alamos laboratory, U.S.A. The obtained calculating results are compared with the
experimentally measured data and a good agreement betwccn them is shown out.
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