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Measurement of the scintillation and ionization response of liquid xenon at MeV energies in the EXO-200 experiment

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Title
Measurement of the scintillation and ionization response of liquid xenon at MeV energies in the EXO-200 experiment
Author(s)
Anton, G; Badhrees, I; Barbeau, PS; Beck, D; Belov, V; Bhatta, T; Breidenbach, M; Brunner, T; Cao, GF; Cen, WR; Chambers, C; Cleveland, B; Coon, M; Craycraft, A; Daniels, T; Darroch, L; Daugherty, SJ; Davis, J; Delaquis, S; Mesrobian-Kabakian, AD; DeVoe, R; Dilling, J; Dolgolenko, A; Dolinski, MJ; Echevers, J; Fairbank, W; Fairbank, D; Farine, J; Feyzbakhsh, S; Fierlinger, P; Fudenberg, D; Gautam, P; Gornea, R; Gratta, G; Hall, C; Hansen, EV; Hoessl, J; Hufschmidt, P; Hughes, M; Iverson, A; Jamil, A; Jessiman, C; Jewell, MJ; Johnson, A; Karelin, A; Kaufman, LJ; Koffas, T; Krucken, R; Kuchenkov, A; Kumar, KS; Lan, Y; Larson, A; Lenardo, BG; Douglas Leonard; Li, GS; Li, S; Li, Z; Licciardi, C; Lin, YH; MacLellan, R; McElroy, T; Michel, T; Mong, B; Moore, DC; Murray, K; Neilson, R; Njoya, O; Nusair, O; Odian, A; Ostrovskiy, I; Piepke, A; Pocar, A; Retiere, F; Robinson, AL; Rowson, PC; Runge, J; Schmidt, S; Sinclair, D; Soma, AK; Stekhanov, V; Tarka, M; Todd, J; Tolba, T; Tosi, D; Totev, TI; Veenstra, B; Veeraraghavan, V; Vuilleumier, JL; Wagenpfeil, M; Watkins, J; Weber, M; Wen, LJ; Wichoski, U; Wrede, G; Wu, SX; Xia, Q; Yahne, DR; Yang, L; Yen, YR; Zeldovich, OY; Ziegler, T
Subject
INFRARED SCINTILLATION, ; X-RAYS, ; SILICON, ; YIELDS, ; ARGON, ; DEPENDENCE, ; EFFICIENCY, ; PAIR
Publication Date
2020-06
Journal
PHYSICAL REVIEW C, v.101, no.6, pp.065501
Publisher
AMER PHYSICAL SOC
Abstract
© 2020 American Physical Society. Liquid xenon (LXe) is employed in a number of current and future detectors for rare event searches. We use the EXO-200 experimental data to measure the absolute scintillation and ionization yields generated by gamma interactions from Th-228 (2615 keV), Ra-226 (1764 keV), and Co-60 (1332 keV and 1173 keV) calibration sources, over a range of electric fields. The W value that defines the recombination-independent energy scale is measured to be 11.5 +/- 0.5 (syst.) +/- 0.1 (stat.) eV. These data are also used to measure the recombination fluctuations in the number of electrons and photons produced by the calibration sources at the MeV scale, which deviate from extrapolations of lower-energy data. Additionally, a semiempirical model for the energy resolution of the detector is developed, which is used to constrain the recombination efficiency, i.e., the fraction of recombined electrons that result in the emission of a detectable photon. Detailed measurements of the absolute charge and light yields for MeV-scale electron recoils are important for predicting the performance of future neutrinoless double beta-decay detectors
URI
https://pr.ibs.re.kr/handle/8788114/7809
DOI
10.1103/PhysRevC.101.065501
ISSN
0556-2813
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
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