Neutron calibration facility with an Am-Be source for pulse shape discrimination measurement of CsI(Tl) crystals
H.S. Lee, H. Bhang, J.H. Choi, S. Choi, I.S. Hahn, E.J. Jeon, H.W., Joo, W.G. Kang, G.B. Kim, H.J. Kim, K.W. Kim, S.C. Kim, S.K. Kim, Y.D. Kim,, Y.H. Kim, J.H. Lee, J.K. Lee, D.S. Leonard, J. Li, S.S. Myung, S.L. Olsen,, and J.H. So
TL;DR
This paper details the development of a neutron calibration setup using an Am-Be source to measure pulse shape discrimination in CsI(Tl) crystals, aiding dark matter detection efforts.
Contribution
It introduces a neutron calibration facility with an Am-Be source for PSD measurement in CsI(Tl) crystals, demonstrating its effectiveness for dark matter research.
Findings
Successful measurement of pulse shape discrimination quality factors.
Comparison shows Am-Be source calibration is feasible and effective.
Results support use of Am-Be sources for neutron calibration in dark matter experiments.
Abstract
We constructed a neutron calibration facility based on a 300-mCi Am-Be source in conjunction with a search for weakly interacting massive particle candidates for dark matter. The facility is used to study the response of CsI(Tl) crystals to nuclear recoils induced by neutrons from the Am-Be source and comparing them with the response to electron recoils produced by Compton scattering of 662-keV -rays from a Cs source. The measured results on pulse shape discrimination (PSD) between nuclear- and electron-recoil events are quantified in terms of quality factors. A comparison with similar result from a neutron reactor demonstrate the feasibility of performing calibrations of PSD measurements using neutrons from a Am-Be source.
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