期刊论文

Liu, L.-J.

中文

核电子学与探测技术

0258-0934

2014

34

9

1037-1040

10.3969/j.issn.0258-0934.2014.09.001

本校为第一且通讯机构

在CT 扫描精确获得HPGe探测器结构尺寸的基础上，用MCNP4C蒙特卡罗程序建立了HPGeγ谱仪计算点源的物理模型；通过对探测器死层尺寸的精确校正，确定了探测器死层厚度为0．38 cm；以点源物理模型和探测器死层校正尺寸为基础，分别计算了60 Co、133 Ba、137 Cs、241 Am和152 Eu标准点源各能量分支的探测效率，并与实验结果比较，计算在59．54～1408．01 keV能量范围内探测效率的最大相对偏差为2．39％，最小相对偏差为0．13％。

On the basis of accurate HPGe detector's size which is obtained by CT scanning, the calculation of point source physical model in HPGe gamma spectrometer is established by using MCNP4C Monte Carlo code; By means of correcting the detector dead layer, the final dead layer thickness is identified as 0.38 cm; Based on the point source physical model and the result of detector dead layer correction, detection efficiencies of each energy branch of 60Co, 133Ba, 137Cs, 241Am and 152Eu standard point sources are calculated by MCNP4C, comparing with the...