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 . Mean recoil energies down to 1 keV were measured with unprecedented precision. We find that the charge and light yield are anticorrelated above and that the field dependence becomes negligible below . However, below 3 keV, we find a charge yield significantly higher than expectation and a reconstructed energy deviating from linearity.
2 More- Received 1 December 2016
DOI:https://doi.org/10.1103/PhysRevD.96.103007
© 2017 American Physical Society