Author:
Yan Binbin,Abdukerim Abdusalam,Chen Wei,Chen Xun,Chen Yunhua,Cheng Chen,Cui Xiangyi,Fan Yingjie,Fang Deqing,Fu Changbo,Fu Mengting,Geng Lisheng,Giboni Karl,Gu Linhui,Guo Xuyuan,Han Ke,He Changda,Huang Di,Huang Peiyao,Huang Yan,Huang Yanlin,Huang Zhou,Ji Xiangdong,Ju Yonglin,Li Shuaijie,Liu Jianglai,Lei Zhuoqun,Ma Wenbo,Ma Yugang,Mao Yajun,Meng Yue,Ni Kaixiang,Ning Jinhua,Ning Xuyang,Ren Xiangxiang,Shang Changsong,Si Lin,Shen Guofang,Tan Andi,Wang Anqing,Wang Hongwei,Wang Meng,Wang Qiuhong,Wang Siguang,Wang Wei,Wang Xiuli,Wang Zhou,Wu Mengmeng,Wu Shiyong,Wu Weihao,Xia Jingkai,Xiao Mengjiao,Xie Pengwei,Yan Rui,Yang Jijun,Yang Yong,Yu Chunxu,Yuan Jumin,Yuan Ying,Yue Jianfeng,Zeng Xinning,Zhang Dan,Zhang Tao,Zhao Li,Zheng Qibin,Zhou Jifang,Zhou Ning,Zhou Xiaopeng,(PandaX-II Collaboration)
Abstract
Abstract
We present a systematic determination of the responses of PandaX-II, a dual phase xenon time projection chamber detector, to low energy recoils. The electron recoil (ER) and nuclear recoil (NR) responses are calibrated, respectively, with injected tritiated methane or 220Rn source, and with 241Am-Be neutron source, in an energy range from 1-25 keV (ER) and 4-80 keV (NR), under the two drift fields, 400 and 317 V/cm. An empirical model is used to fit the light yield and charge yield for both types of recoils. The best fit models can describe the calibration data significantly. The systematic uncertainties of the fitted models are obtained via statistical comparison to the data.
Funder
Office of Science and Technology Shanghai Municipal Government
National Natural Science Foundation of China
Ministry of Science and Technology of China
Subject
Astronomy and Astrophysics,Instrumentation,Nuclear and High Energy Physics