Measurement of light and charge yield of low-energy electronic recoils in liquid xenon

L. W. Goetzke, E. Aprile, M. Anthony, G. Plante, and M. Weber
Phys. Rev. D 96, 103007 – Published 13 November 2017

Abstract

The dependence of the light and charge yield of liquid xenon on the applied electric field and recoil energy is important for dark matter detectors using liquid xenon time projections chambers. Few measurements have been made of this field dependence at recoil energies less than 10 keV. In this paper, we present results of such measurements using a specialized detector. Recoil energies are determined via the Compton coincidence technique at four drift fields relevant for liquid xenon dark matter detectors: 0.19, 0.48, 1.02, and 2.32kV/cm. Mean recoil energies down to 1 keV were measured with unprecedented precision. We find that the charge and light yield are anticorrelated above 3keV and that the field dependence becomes negligible below 6keV. However, below 3 keV, we find a charge yield significantly higher than expectation and a reconstructed energy deviating from linearity.

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  • Received 1 December 2016

DOI:https://doi.org/10.1103/PhysRevD.96.103007

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Particles & FieldsGravitation, Cosmology & Astrophysics

Authors & Affiliations

L. W. Goetzke*, E. Aprile, M. Anthony, G. Plante, and M. Weber

  • Physics Department, Columbia University, New York, 10027 New York, USA

  • *Corresponding author. lukeg@phys.columbia.edu
  • Present address: Siemens, Munich, Germany.

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Vol. 96, Iss. 10 — 15 November 2017

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