The effect of front edge on efficiency for point and volume source geometries in p-type HPGe detectors

Monte Carlo (MC) simulations are increasingly being used as an alternative or supplement to the gamma spectrometric method in determining the full energy peak efficiency (FEPE) necessary for radionuclide identification and quantification. The MC method is more advantageous than the experimental meth...

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Bibliographic Details
Published in:Nuclear engineering and technology 2022-11, Vol.54 (11), p.4220-4225
Main Authors: Uyar, Esra, Bölükdemir, Mustafa Hicabi
Format: Article
Language:English
Subjects:
Full energy peak efficiency
HPGe
Monte Carlo simulation
PHITS
Rounded edge
Sharp edge
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Summary:Monte Carlo (MC) simulations are increasingly being used as an alternative or supplement to the gamma spectrometric method in determining the full energy peak efficiency (FEPE) necessary for radionuclide identification and quantification. The MC method is more advantageous than the experimental method in terms of both cost and time. Experimental calibration with standard sources is difficult, especially for specimens with unusually shaped geometries. However, with MC, efficiency values can be obtained by modeling the geometry as desired without using any calibration source. Modeling the detector with the correct parameters is critical in the MC method. These parameters given to the user by the manufacturer are especially the dimensions of the crystal and its front edge, the thickness of the dead layer, dimensions, and materials of the detector components. This study aimed to investigate the effect of the front edge geometry of the detector crystal on efficiency, so the effect of rounded and sharp modeled front edges on the FEPE was investigated for
ISSN:1738-5733
DOI:10.1016/j.net.2022.06.009