Journal
PHYSICAL REVIEW LETTERS
Volume 112, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.171303
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Funding
- U.S. Department of Homeland Security, Domestic Nuclear Detection Office
- U.S. Department of Defense, Defense Threat Reduction Agency
- LDRD program [LDRD 13-FS-005]
- U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
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This Letter details a measurement of the ionization yield (Q(y)) of 6.7 keV Ar-40 atoms stopping in a liquid argon detector. The Q(y) of 3.6-6.3 detected e(-)/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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