Calibration of liquid argon detector with 83mKr and 22Na in different drift fields

• Published in: Radiation detection technology and methods 2020-06, Vol.4 (2), p.147-152
• Main Authors: Xiong, Wei-Xing, Guan, Meng-Yun, Yang, Chang-Gen, Zhang, Peng, Liu, Jin-Chang, Guo, Cong, Wei, Yu-Ting, Gan, You-Yu, Zhao, Qing, Li, Jia-Jun
• Format: Article
• Language: English
• Subjects: Beam Physics; Hadrons; Heavy Ions; Nuclear Energy; Nuclear Physics; Original Paper; Particle Acceleration and Detection; Physics; Physics and Astronomy
• ISSN: 2509-9930; 2509-9949
• DOI: 10.1007/s41605-020-00162-4

Introduction Liquid noble gases are widely used as targets in low background search experiments, particularly in direct dark matter search experiments. 83m Kr is an excellent low-energy internal calibration source for future larger liquid noble gas detectors. Purpose To calibrate liquid argon detector with 83m Kr in different drift fields and to study the correlation between light yield and drift fields. Method A dual-phase LAr prototype detector was designed to study the 83m Kr responses in liquid argon. 83m Kr atoms are produced through the decay of 83 Rb and introduced into the LAr detector through the circulating purification system. Conclusion We report that the light yield reaches 7.26 ± 0.02 pe/keV for 41.5 keV from 83m Kr and 7.66 ± 0.01 pe/keV for 511 keV from 22 Na, as a comparison. After stopping the fill, the rate decays of 83m Kr are with a fitted half-life of 1.83 ± 0.11 h, which is consistent with the reported value of 1.83 ± 0.02 h. The light yield that varies with the drift electric field from 0 to 200 V/cm has also been reported.