Determination of responses of liquid xenon to low energy electron and nuclear recoils using a PandaX-Ⅱ detector

作者：燕斌斌; 阿布都沙拉木·阿布都克力木; 陈葳; 谌勋; 陈云华; 程晨; 崔祥仪; 樊英杰; 方德清; 符长波; 付孟婷; 耿立升; Karl Giboni; 顾琳慧; 郭绪元; 韩柯; 何昶达; 黄迪; 黄沛尧; 黄焱; 黄彦霖; 黄周; 季向东; 巨永林; 李帅杰; 刘江来; 雷卓群; 马文博; 马余刚; 冒亚军; 孟月; 倪恺翔; 宁金华; 宁旭阳; 任祥祥; 商长松; 司琳; 申国防; 谈安迪; 王安庆; 王宏伟; 王萌; 王秋红; 王思广; 王为; ***; 王舟; 武蒙蒙; 吴世勇; 邬维浩; 夏经铠; 肖梦姣; 谢鹏伟; 严锐; 杨继军; 杨勇; 喻纯旭; 袁鞠敏; 袁影; 樊英杰; 曾鑫宁; 张丹; 张涛; 赵力; 郑其斌; 周济芳; 周宁; 周小朋

来源：Chinese Physics C, 2021, 45(07): 277-286.

• dark matter
• liquid xenon time projection chamber
• calibration
• electron recoil
• nucleon recoil
• NEST2.0

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.

• 单位
  上海交通大学; 北京大学