| Autor: |
Zhang, X., Lin, J., Mikhailik, V. B., Kraus, H. |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Applied Physics Letters 106, 241904 (2015) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1063/1.4922875 |
| Popis: |
Application of CaMoO4 as a scintillation target in cryogenic rare event searches relies on the understanding of scintillation properties of the material at the temperatures at which these detectors operate. We devised and implemented a detection module with a low-temperature photomultiplier from Hamamatsu (model R8520-06) powered by a Cockcroft-Walton generator. The detector module containing the CaMoO4 crystal was placed in a 3He/4He dilution refrigerator and used to measure scintillation characteristics of CaMoO4 in the millikelvin temperature range. At the lowest temperature achieved, the energy resolution of CaMoO4 for 122 keV from a 57Co source is found to be 30% (FWHM), and the fast and slow decay constants are 40.6+-0.8 us and 3410+-50 us, respectively. The temperature variation of the CaMoO4 decay kinetics is discussed in terms of a three-level model of the emission center |
| Databáze: |
arXiv |
| Externí odkaz: |
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