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Observation of the Dependence of Scintillation from Nuclear Recoils in Liquid Argon on Drift Field
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Observation of the Dependence of Scintillation from Nuclear Recoils in Liquid Argon on Drift Field

T Alexander, H. O Back, H Cao, A. G Cocco, F DeJongh, G Fiorillo, C Galbiati, C Ghag, L Grandi, C Kendziora, …
arXiv.org
24 Jun 2013
DOI: https://doi.org/10.48550/arxiv.1306.5675
url
https://doi.org/10.48550/arxiv.1306.5675View
Preprint (Author's original)arXiv.org - Non-exclusive license to distribute,  Open

Abstract

Physics - High Energy Physics - Experiment Physics - Instrumentation and Detectors
Phys. Rev. D 88, 092006 (2013) We have exposed a dual-phase Liquid Argon Time Projection Chamber (LAr-TPC) to a low energy pulsed narrowband neutron beam, produced at the Notre Dame Institute for Structure and Nuclear Astrophysics to study the scintillation light yield of recoiling nuclei in a LAr-TPC. A liquid scintillation counter was arranged to detect and identify neutrons scattered in the LAr-TPC target and to select the energy of the recoiling nuclei. We report the observation of a significant dependence on drift field of liquid argon scintillation from nuclear recoils of 11 keV. This observation is important because, to date, estimates of the sensitivity of noble liquid TPC dark matter searches are based on the assumption that electric field has only a small effect on the light yield from nuclear recoils.

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