Measurement of scintillation efficiency for nuclear recoils in liquid argon
D. Gastler, E. Kearns, A. Hime, L. C. Stonehill, S. Seibert, J. Klein,, W. H. Lippincott, D. N. McKinsey, and J. A. Nikkel
TL;DR
This paper measures how efficiently liquid argon produces scintillation light from nuclear recoils compared to electronic recoils, across a range of energies, providing essential data for particle detection applications.
Contribution
It provides the first detailed measurement of scintillation efficiency for nuclear recoils in liquid argon from 10 keVr to 250 keVr, with a specific efficiency value above 20 keVr.
Findings
Scintillation efficiency is approximately 0.25 above 20 keVr.
Efficiency decreases at lower recoil energies.
Data supports improved calibration for liquid argon detectors.
Abstract
The scintillation light yield of liquid argon from nuclear recoils relative to electronic recoils has been measured as a function of recoil energy from 10 keVr up to 250 keVr. The scintillation efficiency, defined as the ratio of the nuclear recoil scintillation response to the electronic recoil response, is 0.25 \pm 0.01 + 0.01(correlated) above 20 keVr.
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