Stanga D, Radu D, Sima O
National Institute of R&D for Physics and Nuclear Engineering-Horia Hulubei Bucharest-Magurele, Romania.
Appl Radiat Isot. 2010 Jul-Aug;68(7-8):1418-22. doi: 10.1016/j.apradiso.2009.11.027. Epub 2009 Nov 17.
In this paper we present a new semi-empirical model calculation of the peak efficiency for unshielded HPGe detectors based on the virtual point detector and the attenuation factor concepts. The validity of the model calculation was checked by comparison with Monte Carlo efficiency values and experimental efficiencies determined for a HPGe detector type GEM 25P4 using a calibration drum. The discrepancy between experimental and calculated efficiencies is smaller than 10% in the energy range 122-1408 keV.
在本文中，我们基于虚拟点探测器和衰减因子概念，提出了一种用于无屏蔽高纯锗探测器峰值效率的新半经验模型计算方法。通过与蒙特卡罗效率值以及使用校准鼓对GEM 25P4型高纯锗探测器测定的实验效率进行比较，检验了该模型计算的有效性。在122 - 1408 keV能量范围内，实验效率与计算效率之间的差异小于10%。
