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Neutron calibration facility with an Am-Be source for pulse shape discrimination measurement of CsI(Tl) crystals

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arxiv 1409.0948 v3 pith:X7Z5PMCX submitted 2014-09-03 physics.ins-det astro-ph.IMhep-ex

Neutron calibration facility with an Am-Be source for pulse shape discrimination measurement of CsI(Tl) crystals

classification physics.ins-det astro-ph.IMhep-ex
keywords sourceam-befacilityneutroncalibrationcrystalsdiscriminationneutrons
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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 $\gamma$-rays from a $^{137}$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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