Pulse Shape Discrimination of Nuclear Recoil and Electron Recoil Events With a NaI(Tl) Crystal for Dark Matter Search

K. W. Kim; G. Adhikari; P. Adhikari; S. Choi; C. Ha; I. S. Hahn; E. J. Jeon; H. W. Joo; W. G. Kang; H. J. Kim; N. Y. Kim; S. K. Kim; Y. D. Kim; Y. H. Kim; H. S. Lee; M. H. Lee; D. S. Leonard; S. Y. Oh; S. L. Olsen; H. K. Park; H. S. Park; K. S. Park; J. H. Shim; J. H. So; Y. S. Yoon

doi:10.1109/TNS.2016.2525765

Pulse Shape Discrimination of Nuclear Recoil and Electron Recoil Events With a NaI(Tl) Crystal for Dark Matter Search

K. W. Kim
, G. Adhikari
, P. Adhikari
, S. Choi
, C. Ha
, I. S. Hahn
, E. J. Jeon
, H. W. Joo
, W. G. Kang
, H. J. Kim
, N. Y. Kim
, S. K. Kim
, Y. D. Kim
, Y. H. Kim
, H. S. Lee
, M. H. Lee
, D. S. Leonard
, S. Y. Oh
, S. L. Olsen
, H. K. Park

H. S. Park, K. S. Park, J. H. Shim, J. H. So, Y. S. Yoon

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

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.

Original language	English
Article number	7454839
Pages (from-to)	534-538
Number of pages	5
Journal	IEEE Transactions on Nuclear Science
Volume	63
Issue number	2
DOIs	https://doi.org/10.1109/TNS.2016.2525765
Publication status	Published - 2016 Apr
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016 IEEE.

Keywords

KIMS
NaI(Tl) crystal
pulse shape discrimination
WIMP

ASJC Scopus subject areas

Nuclear and High Energy Physics
Nuclear Energy and Engineering
Electrical and Electronic Engineering

Access to Document

10.1109/TNS.2016.2525765

Cite this

Kim, K. W., Adhikari, G., Adhikari, P., Choi, S., Ha, C., Hahn, I. S., 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., Olsen, S. L., ... Yoon, Y. S. (2016). Pulse Shape Discrimination of Nuclear Recoil and Electron Recoil Events With a NaI(Tl) Crystal for Dark Matter Search. IEEE Transactions on Nuclear Science, 63(2), 534-538. Article 7454839. https://doi.org/10.1109/TNS.2016.2525765

Kim, KW, Adhikari, G, Adhikari, P, Choi, S, Ha, C, Hahn, IS, Jeon, EJ, Joo, HW, Kang, WG, Kim, HJ, Kim, NY, Kim, SK, Kim, YD, Kim, YH, Lee, HS, Lee, MH, Leonard, DS, Oh, SY, Olsen, SL, Park, HK, Park, HS, Park, KS, Shim, JH, So, JH & Yoon, YS 2016, 'Pulse Shape Discrimination of Nuclear Recoil and Electron Recoil Events With a NaI(Tl) Crystal for Dark Matter Search', IEEE Transactions on Nuclear Science, vol. 63, no. 2, 7454839, pp. 534-538. https://doi.org/10.1109/TNS.2016.2525765

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title = "Pulse Shape Discrimination of Nuclear Recoil and Electron Recoil Events With a NaI(Tl) Crystal for Dark Matter Search",

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.",

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doi = "10.1109/TNS.2016.2525765",

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volume = "63",

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AU - Kim, Y. D.

AU - Kim, Y. H.

AU - Lee, H. S.

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AU - Leonard, D. S.

AU - Oh, S. Y.

AU - Olsen, S. L.

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AB - 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.

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Pulse Shape Discrimination of Nuclear Recoil and Electron Recoil Events With a NaI(Tl) Crystal for Dark Matter Search

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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