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.
First measurement of the ionization yield of nuclear recoils in liquid argon
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abstract
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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hep-ex 1years
2026 1verdicts
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Characterization of argon recoils at the keV scale with ReD and ReD+
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.