Measurement of the neutron flux in the CPL underground laboratory and simulation studies of neutron shielding for WIMP searches

Searches for weakly interacting massive particles (WIMPs) can be carried out based on the detection of nuclear recoil energy in CsI(Tℓ) crystals. It is crucial to minimize the neutron background as well as to fully understand the remaining background sources through adequate shielding when using the...

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Bibliographic Details
Published in:Astroparticle physics 2004-02, Vol.20 (5), p.549-557
Main Authors: Kim, H.J, Hahn, I.S, Hwang, M.J, Jain, R.K, Kang, U.K, Kim, S.C, Kim, S.K, Kim, T.Y, Kim, Y.D, Kwon, Y.J, Lee, H.S, Lee, J.H, Lee, J.I, Lee, M.H, Lim, D.S, Noh, S.H, Park, H, Park, I.H, Seo, E.S, Won, E, Yang, M.S, Yu, I
Format: Article
Language:English
Subjects:
Active shielding
Dark matter
GEANT4
Neutron background
Underground
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Summary:Searches for weakly interacting massive particles (WIMPs) can be carried out based on the detection of nuclear recoil energy in CsI(Tℓ) crystals. It is crucial to minimize the neutron background as well as to fully understand the remaining background sources through adequate shielding when using the pulse shape discrimination method for WIMP detection. We have measured the neutron flux at 350 m minimum depth, where the CheongPyung underground laboratory (CPL) is located, to be 3.00 ± 0.02 (stat.) ± 0.05 (syst.) × 10 −5 neutrons/cm 2/s with the neutron energy in the range 1.5< E n
ISSN:0927-6505
1873-2852
DOI:10.1016/j.astropartphys.2003.09.001