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Li 2MoO 4 Phonon–Scintillation Detection Systems with MMC Readout

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Title
Li 2MoO 4 Phonon–Scintillation Detection Systems with MMC Readout
Author(s)
Hyelim Kim; Kim H.J.; Inwook Kim; So Ra Kim; Yeongduk Kim; Yong Hamb Kim; Dohyung Kwon; Jin A Jeon; Moo Hyun Lee; Lee M.K.; Jungho So
Publication Date
2020-05
Journal
Journal of Low Temperature Physics, v.199, pp.1082 - 1088
Publisher
Kluwer Academic/Plenum Publishers
Abstract
We developed measurement systems for the simultaneous detection of phonon and scintillation signals from Li 2MoO 4 crystals based on the metallic magnetic calorimeter (MMC) technology. Two measurements were carried out using Li 2MoO 4 crystals of different sizes. The first measurement was conducted with a compact detection system designed for a 1×1×1cm3 crystal. An advanced light detector with Neganov–Luke phonon amplification was adopted in the compact setup. Later, the second experiment was carried out using a cylindrical Li 2MoO 4 crystal of 5 cm in diameter and 5 cm in height. Another light detector was implemented with a 2-in. Ge wafer and an MMC sensor. Both measurements resulted in simultaneous detection of heat and light signals. Clear particle discriminations between α- and β/ γ-induced events were demonstrated by comparing amplitudes of the heat and light signals in both measurements. The heat signals in the larger setup showed an energy resolution of 18 keV FWHM for 2615 keV γ-rays. The energy linearity of the detector response was investigated for a suitable calibration near 3.034 MeV, the Q value of 100Mo double-beta decay
URI
https://pr.ibs.re.kr/handle/8788114/9040
DOI
10.1007/s10909-019-02291-7
ISSN
0022-2291
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
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