Low-Temperature Scintillation Properties of CaWO4 Crystals for Rare-Event Searches
| Autor: | Sivers, M. v., Clark, M., Di Stefano, P. C. F., Erb, A., Gütlein, A., Lanfranchi, J. -C., Münster, A., Nadeau, P., Piquemal, M., Potzel, W., Roth, S., Schreiner, K., Strauss, R., Wawoczny, S., Willers, M., Zöller, A. |
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| Rok vydání: | 2015 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | In prospect of its application in cryogenic rare-event searches, we have investigated the low-temperature scintillation properties of CaWO4 crystals down to 3.4 K under {\alpha} and {\gamma} excitation. Concerning the scintillation decay times, we observe a long component in the ms range which significantly contributes to the light yield below 40K. For the first time we have measured the temperature dependence of the {\alpha}/{\gamma}- ratio of the light yield. This parameter which can be used to discriminate {\alpha} and {\gamma} events in scintillating bolometers is found to be about 8-15% smaller at low temperatures compared to room temperature. Comment: The following article has been accepted by Journal of Applied Physics. After it is published, it will be found at http://scitation.aip.org/content/aip/journal/jap |
| Databáze: | arXiv |
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