Measurement of the scintillation efficiency for nuclear recoils in liquid argon under electric fields up to 3 kV/cm

Abstract

We present a measurement of scintillation efficiency for a few tens of keV nuclear recoils (NR) with a liquid argon time projection chamber under electric fields ranging from $0$ to $3kV/cm$. The calibration data are taken with ${}^{252}\mathrm{Cf}$ radioactive source. Observed scintillation and electroluminescence spectra are simultaneously fit with spectra derived from Geant4-based Monte Carlo simulation and an NR model. The scintillation efficiency extracted from the fit is reported as a function of recoil energy and electric field. This result can be used for designing the detector and for the interpretation of experimental data in searching for scintillation and ionization signals induced by WIMP dark matter.

arXiv comment8 pages, 12 figures

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Cited by in corpus (5)

• A Review of Basic Energy Reconstruction Techniques in Liquid Xenon and Argon Detectors for Dark Matter and Neutrino Physics Using NEST
• Nuclear Fusion Inside Dark Matter
• Improving sensitivity to low-mass dark matter in LUX using a novel electrode background mitigation technique
• Lindhard integral equation with binding energy applied to light and charge yields of nuclear recoils in noble liquid detectors
• Searching for low-mass dark matter via Migdal effect in COSINE-100