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Measurement of the liquid argon energy response to nuclear and electronic recoils

Authors :
Agnes , P.
Dawson , J.
De Cecco , S.
Fan , A.
Fiorillo , G.
Franco , D.
Galbiati , C.
Giganti , C.
Johnson , T.N.
Korga , G.
Kryn , D.
Lebois , M.
Mandarano , A.
Martoff , C.J.
Navrer-Agasson , A.
Pantic , E.
Qi , L.
Razeto , A.
Renshaw , A.L.
Riffard , Q.
Rossi , B.
Savarese , C.
Schlitzer , B.
Tonazzo , A.
Wang , H.
Wang , Y.
Watson , A.W.
Wilson , J.N.
AstroParticule et Cosmologie ( APC - UMR 7164 )
Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA )
Laboratoire de Physique Nucléaire et de Hautes Énergies ( LPNHE )
Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS )
Institut de Physique Nucléaire d'Orsay ( IPNO )
Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS )
Publication Year :
2018
Publisher :
HAL CCSD, 2018.

Abstract

A liquid argon time projection chamber, constructed for the Argon Response to Ionization and Scintillation (ARIS) experiment, has been exposed to the highly collimated and quasi-monoenergetic LICORNE neutron beam at the Institute de Physique Nuclaire Orsay in order to study the scintillation response to nuclear and electronic recoils. An array of liquid scintillator detectors, arranged around the apparatus, tag scattered neutrons and select nuclear recoil energies in the [7, 120] keV energy range. The relative scintillation efficiency of nuclear recoils was measured to high precision at null field, and the ion-electron recombination probability was extracted for a range of applied electric fields. Single Compton scattered electrons, produced by gammas emitted from the de-excitation of $^7$Li* in coincidence with the beam pulse, along with calibration gamma sources, are used to extract the recombination probability as a function of energy and electron drift field. The ARIS results have been compared with three recombination probability parameterizations (Thomas-Imel, Doke-Birks, and PARIS), allowing for the definition of a fully comprehensive model of the liquid argon response to nuclear and electronic recoils down to a few keV range. The constraints provided by ARIS to the liquid argon response at low energy allow the reduction of systematics affecting the sensitivity of dark matter search experiments based on liquid argon

Details

Language :
English
Database :
OpenAIRE
Accession number :
edsair.od......3379..5a173b85257c8e7cdbbba19aa8f1d7b2