Mohammadi M A, Abdi M R, Kamali M, Mostajaboddavati M, Zare M R
Department of Physics, Faculty of Science, University of Isfahan, Isfahan 81747-73441, Islamic Republic of Iran.
Appl Radiat Isot. 2011 Feb;69(2):521-6. doi: 10.1016/j.apradiso.2010.10.024. Epub 2010 Oct 29.
The concept of a virtual point detector (VPD) has been developed and validated in the past for Ge(Li) and HPGe detectors. In the present research, a new semi-empirical equation involving photon energy and source-virtual point detector distance for the efficiency of point sources by HPGe detectors is introduced , which is based on the VPD model. The calculated efficiencies for both coaxial and off-axis geometries by this equation are in good agreement with experimental data. The estimated uncertainties are less than 4%.
虚拟点探测器（VPD）的概念过去已针对锗酸锂（Ge(Li)）探测器和高纯锗（HPGe）探测器得到了发展与验证。在本研究中，引入了一个基于VPD模型的、涉及光子能量和源 - 虚拟点探测器距离的新的半经验方程，用于计算HPGe探测器对点状源的探测效率。通过该方程计算得到的同轴和离轴几何结构的探测效率与实验数据吻合良好。估计的不确定度小于4%。
