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Updated: Apr 29, 2026

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator
Published on: May 9, 2014
First measurement of the ionization yield of nuclear recoils in liquid argon
T H Joshi1, S Sangiorgio2, A Bernstein2
1Department of Nuclear Engineering, University of California, Berkeley, California 94720, USA and Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
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(-)/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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