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Pulse Shape Discrimination of Nuclear Recoil and Electron Recoil Events With a NaI(Tl) Crystal for Dark Matter Search
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- Title
- Pulse Shape Discrimination of Nuclear Recoil and Electron Recoil Events With a NaI(Tl) Crystal for Dark Matter Search
- Author(s)
- Kim K.W.; Adhikari G.; Adhikari P.; Choi S.; Ha C.; Kevin Insik, Hahn; Jeon E.J.; Joo H.W.; Kang W.G.; Kim H.J.; Kim N.Y.; Kim S.K.; Kim Y.D.; Kim Y.H.; Lee H.S.; Lee M.H.; Leonard D.S.; Oh S.Y.; Stephen Lars Olsen; Park H.K.; Park H.S.; Park K.S.; Shim J.H.; So J.H.; Yoon Y.S.
- Publication Date
- 2016-04
- Journal
- IEEE TRANSACTIONS ON NUCLEAR SCIENCE, v.63, no.2, pp.534 - 538
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Abstract
- In order to investigate discrimination between nuclear recoil and electron recoil events for the KIMS-NaI dark matter search experiment, we measured the pulse shapes produced by neutrons and gamma rays in a NaI(Tl) crystal. Relatively good pulse shape discrimination (PSD) power due to high light output of recently developed crystals makes it possible to test whether the annual modulation signal observed by the DAMA/LIBRA experiment is caused by nuclear recoil events. We applied the PSD to underground data taken with a 9.15 kg low-background and high-light-output NaI(Tl) crystal for 134 days. Good agreement between underground data and electron recoil events was observed. © 2016 IEEE
- ISSN
- 0018-9499
-
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