Ultra-Low Energy Calibration of LUX Detector using $^{127}$Xe Electron Capture

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Title: Ultra-Low Energy Calibration of LUX Detector using $^{127}$Xe Electron Capture
Authors: Collaboration, LUX
Akerib, DS
Alsum, S
Araújo, HM
Bai, X
Bailey, AJ
Balajthy, J
Beltrame, P
Bernard, EP
Bernstein, A
Biesiadzinski, TP
Boulton, EM
Brás, P
Byram, D
Cahn, SB
Carmona-Benitez, MC
Chan, C
Currie, A
Cutter, JE
Davison, TJR
Dobi, A
Druszkiewicz, E
Edwards, BN
Fallon, SR
Fan, A
Fiorucci, S
Gaitskell, RJ
Genovesi, J
Ghag, C
Gilchriese, MGD
Hall, CR
Hanhardt, M
Haselschwardt, SJ
Hertel, SA
Hogan, DP
Horn, M
Huang, DQ
Ignarra, CM
Jacobsen, RG
Ji, W
Kamdin, K
Kazkaz, K
Khaitan, D
Knoche, R
Larsen, NA
Lenardo, BG
Lesko, KT
Lindote, A
Lopes, MI
Manalaysay, A
Mannino, RL
Marzioni, MF
McKinsey, DN
Mei, DM
Mock, J
Moongweluwan, M
Morad, JA
Murphy, ASJ
Nehrkorn, C
Nelson, HN
Neves, F
O'Sullivan, K
Oliver-Mallory, KC
Palladino, KJ
Pease, EK
Rhyne, C
Shaw, S
Shutt, TA
Silva, C
Solmaz, M
Solovov, VN
Sorensen, P
Sumner, TJ
Szydagis, M
Taylor, DJ
Taylor, WC
Tennyson, BP
Terman, PA
Tiedt, DR
To, WH
Tripathi, M
Tvrznikova, L
Uvarov, S
Velan, V
Verbus, JR
Webb, RC
White, JT
Whitis, TJ
Witherell, MS
Wolfs, FLH
Xu, J
Yazdani, K
Young, SK
Zhang, C
Item Type: Journal Article
Abstract: We report an absolute calibration of the ionization yields($\textit{Q$_y$})$ and fluctuations for electronic recoil events in liquid xenon at discrete energies between 186 eV and 33.2 keV. The average electric field applied across the liquid xenon target is 180 V/cm. The data are obtained using low energy $^{127}$Xe electron capture decay events from the 95.0-day first run from LUX (WS2013) in search of Weakly Interacting Massive Particles (WIMPs). The sequence of gamma-ray and X-ray cascades associated with $^{127}$I de-excitations produces clearly identified 2-vertex events in the LUX detector. We observe the K- (binding energy, 33.2 keV), L- (5.2 keV), M- (1.1 keV), and N- (186 eV) shell cascade events and verify that the relative ratio of observed events for each shell agrees with calculations. The N-shell cascade analysis includes single extracted electron (SE) events and represents the lowest-energy electronic recoil $\textit{in situ}$ measurements that have been explored in liquid xenon.
Issue Date: 28-Dec-2017
URI: http://hdl.handle.net/10044/1/55163
Copyright Statement: © The Authors
Keywords: physics.ins-det
Notes: 10 pages, 10 figures, 2 tables
Open Access location: https://arxiv.org/abs/1708.06086
Appears in Collections:Physics
High Energy Physics
Faculty of Natural Sciences

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