【摘 要】
：
We present a systematic determination of the responses of PandaX-Ⅱ,a dual phase xenon time projec-tion chamber detector,to low energy recoils.The electron recoil (ER) and nuclear recoil (NR) responses are calib-rated,respectively,with injected tritiated m
【机 构】
：
School of Physics and Astronomy,Shanghai Jiao Tong University,MOE Key Laboratory for Particle Astrop
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We present a systematic determination of the responses of PandaX-Ⅱ,a dual phase xenon time projec-tion chamber detector,to low energy recoils.The electron recoil (ER) and nuclear recoil (NR) responses are calib-rated,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.
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