Breier R, Laubenstein M, Povinec P P
Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University, 84248 Bratislava, Slovakia.
INFN - Laboratori Nazionali del Gran Sasso, Via G. Acitelli 22, L'Aquila (AQ), I-67100 Assergi, Italy.
Appl Radiat Isot. 2017 Aug;126:188-190. doi: 10.1016/j.apradiso.2016.12.039. Epub 2017 Jan 15.
Monte Carlo (MC) simulation of background components of an ultra-low background high purity germanium (HPGe) detector operating in a deep underground laboratory was carried out. The results show that the background of the HPGe detector is about two orders of magnitude higher than the MC prediction when accounting only for cosmic-ray induced background. The difference is due to natural radioactivity in the parts surrounding the Ge detector. To get reasonable agreement between MC simulations and the experiment, a contamination in the parts surrounding the Ge crystal from K, Tl and Bi of 0.1mBqkg was required to include in the simulations.
对在深地下实验室运行的超低本底高纯锗（HPGe）探测器的本底成分进行了蒙特卡罗（MC）模拟。结果表明，仅考虑宇宙射线诱发本底时，HPGe探测器的本底比MC预测值高约两个数量级。差异是由于锗探测器周围部件中的天然放射性。为使MC模拟与实验合理吻合，需要在模拟中纳入锗晶体周围部件中钾、铊和铋的0.1mBq/kg的污染。
