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

Author(s): Lee, HS; Bhang, H; Choi, JH; Choi, S; Kevin Insik, Hahn; Eunju Jeon; Joo, HW; Woon Gu Kang; Geon Bo Kim; Kim, HJ; Kim, KW; Kim, SC; Kim, SK; Yeongduk Kim; Yong Hamb Kim; Lee, JH; Lee, JK; Leonard, DS; Jin Li; Myung, SS; Olsen, SL; Jungho So

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 g -rays from a 137Cs 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 our previous result from a neutron generator demonstrate the feasibility of performing calibrations of PSD measurements using neutrons from a Am-Be source.