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Astrophysics > Instrumentation and Methods for Astrophysics

arXiv:1503.05253 (astro-ph)
[Submitted on 18 Mar 2015 (v1), last revised 26 Aug 2015 (this version, v2)]

Title:Pulse-shape discrimination between electron and nuclear recoils in a NaI(Tl) crystal

Authors:H.S. Lee, G. Adhikari, P. Adhikari, S. Choi, I.S. Hahn, E.J. Jeon, H.W. Joo, W.G. Kang, G.B. Kim, H.J. Kim, H.O. Kim, K.W. Kim, N.Y. Kim, S.K. Kim, Y.D. Kim, Y.H. Kim, J.H. Lee, M.H. Lee, D.S. Leonard, J. Li, S.Y. Oh, S.L. Olsen, H.K. Park, H.S. Park, K.S. Park, J.H. Shim, J.H. So
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Abstract:We report on the response of a high light-output NaI(Tl) crystal to nuclear recoils induced by neutrons from an Am-Be source and compare the results with the response to electron recoils produced by Compton scattered 662 keV $\gamma$-rays from a $^{137}$Cs source. The measured pulse-shape discrimination (PSD) power of the NaI(Tl) crystal is found to be significantly improved because of the high light output of the NaI(Tl) detector. We quantify the PSD power with a quality factor and estimate the sensitivity to the interaction rate for weakly interacting massive particles (WIMPs) with nucleons, and the result is compared with the annual modulation amplitude observed by the DAMA/LIBRA experiment. The sensitivity to spin-independent WIMP-nucleon interactions based on 100 kg$\cdot$year of data from NaI detectors is estimated with simulated experiments, using the standard halo model.
Comments: 11pages
Subjects: Instrumentation and Methods for Astrophysics (astro-ph.IM); High Energy Physics - Experiment (hep-ex); Instrumentation and Detectors (physics.ins-det)
Cite as: arXiv:1503.05253 [astro-ph.IM]
  (or arXiv:1503.05253v2 [astro-ph.IM] for this version)
  https://doi.org/10.48550/arXiv.1503.05253
Journal reference: JHEP 08 (2015) 093
Related DOI: https://doi.org/10.1007/JHEP08%282015%29093

Submission history

From: Hyun Su Lee [view email]
[v1] Wed, 18 Mar 2015 00:29:03 UTC (41 KB)
[v2] Wed, 26 Aug 2015 01:22:47 UTC (63 KB)
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