Mathematical method to calculate full-energy peak efficiency of detectors based on transfer technique

被引：32
作者：
Gouda, M. M. [1 ]
Hamzawy, A. [2 ]
Badawi, M. S. [1 ]
El-Khatib, A. M. [1 ]
Thabet, A. A. [3 ]
Abbas, M. I. [1 ]
机构：
[1] Univ Alexandria, Fac Sci, Dept Phys, Alexandria 21511, Egypt
[2] Umm Al Qura Univ, Univ Coll, Dept Phys, Makkah Al Mokrama, Saudi Arabia
[3] Pharos Univ Alexandria, Fac Allied Med Sci, Dept Med Equipment Technol, Alexandria, Egypt
来源：
INDIAN JOURNAL OF PHYSICS | 2016年 / 90卷 / 02期
关键词：
High-purity germanium well-type detector; Cylindrical sources; Self-attenuation; Coincidence summing effect; Efficiency transfer method; COINCIDENCE SUMMING CORRECTIONS; GAMMA-RAY SPECTROMETRY; WELL-TYPE DETECTORS; SELF-ATTENUATION; NAI TL; COMPUTATION; CALIBRATE;
D O I：
10.1007/s12648-015-0737-1
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The full-energy peak efficiency of high-purity germanium well-type detector is extremely important to calculate the absolute activities of natural and artificial radionuclides for samples with low radioactivity. In this work, the efficiency transfer method in an integral form is proposed to calculate the full-energy peak efficiency and to correct the coincidence summing effect for a high-purity germanium well-type detector. This technique is based on the calculation of the ratio of the effective solid angles subtended by the well-type detector with cylindrical sources measured inside detector cavity and an axial point source measured out the detector cavity including the attenuation of the photon by the absorber system. This technique can be easily applied in establishing the efficiency calibration curves of well-type detectors. The calculated values of the efficiency are in good agreement with the experimental calibration data obtained with a mixed gamma-ray standard source containing Co-60 and Y-88.
引用
收藏
页码：201 / 210
页数：10
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