Gamma, neutron, and muon-induced environmental background simulations for 100Mo-based bolometric double-beta decay experiment at Jinping Underground Laboratory

分类： 物理学 >> 核物理学 提交时间： 2023-08-29

Wei Chen Long Ma Jin-Hui Chen Huan-Zhong Huang

摘要： The sensitivity of an experiment to detect the Majorana neutrino mass via neutrinoless double beta decay (0) strongly depends on the rate of background events that can mimic this decay. One major source of this background is the radioactive emissions from the laboratory environment. In our study, we focused on assessing the background contributions from environmental gamma rays, neutrons, and underground muons to the Jinping bolometric demonstration experiment. This experiment uses an array of lithium molybdate crystal bolometers to probe the potential 0 decay of the 100Mo isotope at the China Jinping Underground Laboratory. We also evaluated the shielding effectiveness of the experimental setup through an attenuation study. Our simulations indicate that the combined background from environmental gamma rays, neutrons, and muons in the relevant 100Mo 0 Q-value region can be reduced to approximately 0.003 cts/kg/keV/yr.

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