Feasibility study of PbWO(4) and PbMoO(4) crystal scintillators for cryogenic rare events experiments
2010
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Abstract: (Elsevier)
Scintillation properties of PbWO_4 and PbMoO_4 have been studied as potential cryogenic scintillators for rare event searches. The light output and decay kinetics of PbWO_4 and PbMoO_4 crystals for excitation with ^2^4^1Am @a particles were examin ed over the temperature range 7-300K. The @a/@c ratio was measured with a PbMoO_4 crystal scintillator for 5.3MeV @a particles, and the ability to distinguish between signals induced by @a particles and @c quanta by pulse shape discrimination was assessed for the PbMoO_4 crystal scintillator at 77K. The energy dependence of the quenching factor for oxygen, molybdenum, tungsten and lead ions at low energy was calculated using a semi-empirical approach with data from the @a particle measurements. The study demonstrates the good potential of these scintillators for cryogenic dark matter search and double beta decay experiments.- scintillation counter: crystal
- scintillation counter: cryogenics
- photon: yield
- excited state: decay
- lead: molybdenum
- quenching
- lead: tungsten
- oxygen
- helium: irradiation
- yield: temperature dependence
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