Abstract
This paper presents theoretical calculations by the Monte-Carlo method of the intrinsic efficiencies, photo and double-escape fractions of Ge(Li) drift detectors for parallel beams of gamma rays in the range of energy from 100 keV to 10 MeV. For the photopeak efficiencies the calculations were made from 100 keV to 1.5 MeV and for the double-escape peak efficiencies, they were carried for energies greater than 1.5 MeV. The detectors considered were cylinders having 18 mm dia. and depletion depths of 2, 3.5, 4, 5, 6, 7, 8, 9 and 10 mm. The results are compared with the experimental values obtained by Ewan et al. 1) with a 18 × 3.5 mm detector, for both the photopeak and the double-escape peak efficiencies and with a 5 cm 2 × 8 mm for the full energy peak efficiency.
Published Version
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