Publication Date:
2015-10-30
Description:
In prospect of its application in cryogenic rare-event searches, we have investigated the low-temperature scintillation properties of CaWO 4 crystals down to 3.4 K under α and γ excitation. Concerning the scintillation decay times, we observe a long component in the ms range which significantly contributes to the light yield below 40 K. For the first time we have measured the temperature dependence of the α / γ -ratio of the light yield. This parameter, which can be used to discriminate α and γ events in scintillating bolometers, is found to be ∼8%–15% smaller at low temperatures compared to room temperature.
Print ISSN:
0021-8979
Electronic ISSN:
1089-7550
Topics:
Physics
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