A numerical approach to calculate the full-energy peak efficiency of HPGe well-type detectors using the effective solid angle ratio

被引：28
|
作者：
Badawi, M. S. [1 ]
Ruskov, I. [2 ,3 ]
Gouda, M. M. [1 ]
El-Khatib, A. M. [1 ]
Alotiby, M. F. [4 ]
Mohamed, M. M. [5 ]
Thabet, A. A. [5 ]
Abbas, M. I. [1 ]
机构：
[1] Univ Alexandria, Fac Sci, Dept Phys, Alexandria 21511, Egypt
[2] Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 141980, Russia
[3] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, BU-1784 Sofia, Bulgaria
[4] King Abdulaziz City Sci & Technol, Riyadh 1144, Saudi Arabia
[5] Pharos Univ Alexandria, Dept Med Equipment Technol, Alexandria, Egypt
来源：
JOURNAL OF INSTRUMENTATION | 2014年 / 9卷
关键词：
Solid state detectors; Gamma detectors (scintillators; CZT; HPG; HgI etc); Gamma detectors; Detector modelling and simulations I (interaction of radiation with matter; interaction of photons with matter; interaction of hadrons with matter etc); COINCIDENCE-SUMMING CORRECTIONS; GAMMA-RAYS; NAI TL; GE; CALIBRATE;
D O I：
10.1088/1748-0221/9/07/P07030
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
In the field of gamma-ray spectroscopy with HPGe detectors, applied to measurements of activity when the sample to be measured is small and has low radioactivity, the well-type HPGe detectors are widely used. To determine the sample activity, the full-energy peak efficiency is needed. In this work, the efficiency transfer method (ET) in an integral form is proposed to calculate the full-energy peak efficiency and to correct the coincidence summing effect for the HPGe well-type detector. This approach is based on the calculation of the effective solid angles ratio for a well-type detector with a cylindrical source inside and an axial point source outside the detector cavity, taking into account the attenuation of the gamma-rays. The calculated values of the full-energy peak efficiency are found to be in a good agreement with the measured experimental data obtained by using a mixed radionuclide gamma-ray source containing Co-60 and Y-88.
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页数：19
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