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

Abstract

We report 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 ${}^{220}$Rn source, and with ${}^{241}$Am-Be neutron source, within an energy range from $1-25$ keV (ER) and $4-80$ keV (NR), under the two drift fields of 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 well describe the calibration data. The systematic uncertainties of the fitted models are obtained via statistical comparison against the data.

arXiv comment12 pages, 7 figures

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• A Review of Basic Energy Reconstruction Techniques in Liquid Xenon and Argon Detectors for Dark Matter and Neutrino Physics Using NEST
• Projected sensitivities of the LUX-ZEPLIN (LZ) experiment to new physics via low-energy electron recoils
• Measurement of Double Beta Decay Half-life of ${}^{136}$Xe with the PandaX-4T Detector
• A Review of NEST Models for Liquid Xenon and Exhaustive Comparison to Other Approaches
• Horizontal Position Reconstruction in PandaX-II
• Proposal of a Geiger-type Single-Phase Liquid Xenon Time Projection Chamber as Potential Detector Technique for Dark Matter Direct Search
• Study of background from accidental coincidence signals in the PandaX-II experiment
• A search for two-component Majorana dark matter in a simplified model using the full exposure data of PandaX-II experiment
• Neutron-induced nuclear recoil background in the PandaX-4T experiment
• Light yield and field dependence measurement in PandaX-II dual-phase xenon detector