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arxiv: 1402.2037 · v2 · pith:HEBWNQECnew · submitted 2014-02-10 · ⚛️ physics.ins-det · astro-ph.IM· nucl-ex

First measurement of the ionization yield of nuclear recoils in liquid argon

T. H. Joshi , S. Sangiorgio , A. Bernstein , M. Foxe , C. Hagmann , I. Jovanovic , K. Kazkaz , V. Mozin
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E. B. Norman S. V. Pereverzev F. Rebassoo P. Sorensen
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classification ⚛️ physics.ins-det astro-ph.IMnucl-ex
keywords appliedargondetectorelectricionizationliquidmeasurementyield
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This Letter details a measurement of the ionization yield ($Q_y$) of 6.7 keV $^{40}Ar$ atoms stopping in a liquid argon detector. The $Q_y$ of 3.6-6.3 detected $e^{-}/\mbox{keV}$, for applied electric fields in the range 240--2130 V/cm, is encouraging for the use of this detector medium to search for the signals from hypothetical dark matter particle interactions and from coherent elastic neutrino nucleus scattering. A significant dependence of $Q_y$ on the applied electric field is observed and explained in the context of ion recombination.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Characterization of argon recoils at the keV scale with ReD and ReD+

    hep-ex 2026-02 unverdicted novelty 4.0

    New measurements of argon's ionization yield for nuclear recoils extend coverage to 2 keV and show higher yields at lower energies than prior models.