Abstract
Abstract By means of a Monte Carlo computer program the relative full energy peak efficiency and relative double escape peak efficiency for gamma rays of a cylindrical Ge(Li) detector with volume of 50 m 3 , a rectangular Ge(Li) detector with volume of 30 cm 3 and a trapezoidal Ge(Li) detector with volume of 50 cm 3 has been calculated. The gamma source was assumed to be a point placed 10 cm from the detector. The calculated efficiency curves for the cylindrical detector were compared with the curves experimentally obtained by other authors. The agreement was found to be within quoted errors. The calculated efficiency curves of all three detectors have been used to determine the gamma ray relative intensities in the decays of 22 Na, 60 Co, 56 Co and 226 Ra. It has been found that the relative intensity values of gamma rays for the above sources can be reproduced within 5%.
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