Investigation of the effect of copper contact pin on efficiency in HPGe detectors using Monte Carlo method
Investigation of the effect of copper contact pin on efficiency in HPGe detectors using Monte Carlo method
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使用蒙特卡罗方法研究铜接触针对 HPGe 探测器效率的影响
DOI：
10.1088/1748-0221/16/11/t11003
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发表时间：
2021
影响因子：
1.3
通讯作者：
M. Bölükdemir
中科院分区：
文献类型：
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作者：
E. Uyar;G. Aksoy;H. Ünlü;M. Bölükdemir
在HPGe探测器中，全能峰效率（FEPE）是一个非常重要的参数，它可以通过实验或蒙特卡罗（MC）模拟方法来确定。由于FEPE依赖于探测器的几何参数，制造商提供的参数在用MC方法对探测器建模时非常重要。MC和实验计算之间的差异的最重要的原因是缺乏关于探测器的几何特性的准确信息。探测器孔中间的铜触针的厚度没有由制造商给出。在这项研究中，铜接触针的厚度对探测器效率的影响进行了研究，通过使用PHITS 3.24 MC模拟程序在不同的铜接触针半径和在不同的探测器源的距离。计算了能量范围为59.5 keV-1408 keV的光子在4个不同距离（即5 cm、13.25 cm、15 cm和20 cm）处的效率值，以及铜接触针半径以0.5 mm间隔从1 mm增加到3.5 mm时的效率值。根据结果，已经确定，铜接触引脚的存在导致探测器效率的变化高达1.9%，特别是在高能量区域中，并且在低能量区域中对探测器效率没有影响。此外，已经观察到铜接触针厚度对探测器效率的影响几乎与源-探测器距离无关。
The full energy peak efficiency (FEPE) determined by experimental or Monte Carlo (MC) simulation methods is a very important parameter in HPGe detectors. Since FEPE depends on the detector's geometric parameters, the parameters provided by the manufacturer are of great importance in modeling the detector with the MC method. The most important reason for the discrepancy between MC and experimental calculations is the lack of accurate information about the detector's geometric properties. The thickness of the copper contact pin in the middle of the detector hole is not given by the manufacturer. In this study, the effect of copper contact pin thickness on detector efficiency was investigated by using the PHITS 3.24 MC simulation program both at different copper contact pin radii and at different detector-source distances. The efficiency values were calculated for photons in the energy range of 59.5 keV-1408 keV, at 4 different distances, namely 5 cm, 13.25 cm, 15 cm, and 20 cm and for the radii of copper contact pins increased from 1 mm to 3.5 mm at 0.5 mm intervals. According to the results, it has been determined that the presence of copper contact pins causes a change in detector efficiency up to 1.9%, especially in the high energy region, and has no effect on the detector efficiency in the low energy region. In addition, it has been observed that the effect of copper contact pin thickness on detector efficiency is almost independent of the source-detector distance.
(p)ppGpp 合成以及代谢酶 SpoT 控制环脂肽的产生
DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
鷲尾健司;Siew Ping Lim;Niran Roongsawang;森川正章
通讯作者：
森川正章