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Scintillation Time Dependence and Pulse Shape Discrimination in Liquid Argon by Lippincott, W. H.; Coakley, K. J.; Gastler, D.; Hime, A.; Kearns, E.; McKinsey, D. N.; Nikkel, J. A.; Stonehill, L. C. is a scholarly article available to read on EtoBox.

What is Scintillation Time Dependence and Pulse Shape Discrimination in Liquid Argon about?

Using a single-phase liquid argon detector with a signal yield of 4.85 photoelectrons per keV of electronic-equivalent recoil energy (keVee), we measure the scintillation time dependence of both electronic and nuclear recoils in liquid argon down to 5 keVee. We develop two methods of pulse shape discrimination to distinguish between electronic and nuclear recoils. Using one of these methods, we measure a background and statistics-limited level of electronic recoil contamination to be $7.6\times10^{-7}$ between 60 and 128 keV of nuclear recoil energy (keVr) for a nuclear recoil acceptance of 50% with no nuclear recoil-like events above 72 keVr. Finally, we develop a maximum likelihood method of pulse shape discrimination using the measured scintillation time dependence and predict the sensitivity to WIMP-nucleon scattering in three configurations of a liquid argon dark matter detector.

Author

Lippincott, W. H.; Coakley, K. J.; Gastler, D.; Hime, A.; Kearns, E.; McKinsey, D. N.; Nikkel, J. A.; Stonehill, L. C.

Published

2008

Language

EN