Low-temperature scintillation properties of CaWO4 crystals for rare-event searches

被引：8

作者：

von Sivers, M. ^{[1
]}

Clark, M. ^{[2
]}

Di Stefano, P. C. F. ^{[2
]}

Erb, A. ^{[1
,3
]}

Guetlein, A. ^{[1
]}

Lanfranchi, J. -C. ^{[1
]}

Muenster, A. ^{[1
]}

Nadeau, P. ^{[2
]}

Piquemal, M. ^{[2
]}

Potzel, W. ^{[1
]}

Roth, S. ^{[1
]}

Schreiner, K. ^{[2
]}

Strauss, R. ^{[1
]}

Wawoczny, S. ^{[1
]}

Willers, M. ^{[1
]}

Zoeller, A. ^{[1
]}

机构：

[1] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany

[2] Queens Univ, Dept Phys Engn Phys & Astron, Kingston, ON K7L 3N6, Canada

[3] Walther Meissner Inst Low Temp Res, D-85748 Garching, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2015年 / 118卷 / 16期

基金：

加拿大自然科学与工程研究理事会;

关键词：

DOUBLE-BETA DECAY; DARK-MATTER; CRESST-II; BOLOMETER; DISCRIMINATION;

D O I：

10.1063/1.4934741

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In prospect of its application in cryogenic rare-event searches, we have investigated the low-temperature scintillation properties of CaWO4 crystals down to 3.4K 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 40 K. 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 similar to 8%-15% smaller at low temperatures compared to room temperature. (C) 2015 AIP Publishing LLC.

引用

页数：7

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