DarkSide-50 has demonstrated the high potential of dual-phase liquid argon time projection chambers in exploring interactions of WIMPs in the GeV/c2 mass range. The technique, based on the detection of the ionization signal amplified via electroluminescence in the gas phase, allows us to explore recoil energies down to the sub-keV range. We report here on the DarkSide-50 measurement of the ionization yield of electronic recoils down to ∼180  eVer, exploiting Ar37 and Ar39 decays, and extrapolated to a few ionization electrons with the Thomas-Imel box model. Moreover, we present a model-dependent determination of the ionization response to nuclear recoils down to ∼500  eVnr, the lowest ever achieved in liquid argon, using in situ neutron calibration sources and external datasets from neutron beam experiments.

Agnes, P., Albuquerque, I. . ., Alexander, T., Alton, A. ., Ave, M., Back, H. ., et al. (2021). Calibration of the liquid argon ionization response to low energy electronic and nuclear recoils with DarkSide-50. PHYSICAL REVIEW D, 104(8) [10.1103/PhysRevD.104.082005].

Calibration of the liquid argon ionization response to low energy electronic and nuclear recoils with DarkSide-50

Bussino, S.
Membro del Collaboration Group
;
Mari, S. M.
Membro del Collaboration Group
;
Sanfilippo, S.
Membro del Collaboration Group
;
2021

Abstract

DarkSide-50 has demonstrated the high potential of dual-phase liquid argon time projection chambers in exploring interactions of WIMPs in the GeV/c2 mass range. The technique, based on the detection of the ionization signal amplified via electroluminescence in the gas phase, allows us to explore recoil energies down to the sub-keV range. We report here on the DarkSide-50 measurement of the ionization yield of electronic recoils down to ∼180  eVer, exploiting Ar37 and Ar39 decays, and extrapolated to a few ionization electrons with the Thomas-Imel box model. Moreover, we present a model-dependent determination of the ionization response to nuclear recoils down to ∼500  eVnr, the lowest ever achieved in liquid argon, using in situ neutron calibration sources and external datasets from neutron beam experiments.
Agnes, P., Albuquerque, I. . ., Alexander, T., Alton, A. ., Ave, M., Back, H. ., et al. (2021). Calibration of the liquid argon ionization response to low energy electronic and nuclear recoils with DarkSide-50. PHYSICAL REVIEW D, 104(8) [10.1103/PhysRevD.104.082005].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/392970
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