Abstract
This Letter details a measurement of the ionization yield () of 6.7 keV atoms stopping in a liquid argon detector. The of 3.6–6.3 detected , for applied electric fields in the range , 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 on the applied electric field is observed and explained in the context of ion recombination.
- Received 10 February 2014
DOI:https://doi.org/10.1103/PhysRevLett.112.171303
© 2014 American Physical Society