Properties of CdWO4 and ZnWO4 at liquid nitrogen temperature

T¿ samples of 10 mm diameter and 10 mm height CdWO 4 (CdWO) and ZnWO 4 (ZnWO) scintillators were studied at room (RT) and liquid nitrogen (LN 2 ) temperature. At room temperature the crystals were coupled to a Photonis XP3212 photomultiplier. During experiments in liquid nitrogen a Large Area Avalan...

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Main Authors: Klamra, W., Szczesniak, T., Moszynski, M., Iwanowska, J., Swiderski, L., Syntfeld-Kazuch, A., Shlegel, V.N., Vasiliev, Ya.V., Galashov, E.N.
Format: Conference Proceeding
Language:English
Subjects:
CWO
Fysiologi och farmakologi
intrinsic resolution
light output
liquid nitrogen temperature
MEDICIN
MEDICINE
nonproportionality
Nuclear and plasma sciences
Physiology and pharmacology
Radiologi
Radiological research
Radiologisk forskning
Radiology
ZWO
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Summary:T¿ samples of 10 mm diameter and 10 mm height CdWO 4 (CdWO) and ZnWO 4 (ZnWO) scintillators were studied at room (RT) and liquid nitrogen (LN 2 ) temperature. At room temperature the crystals were coupled to a Photonis XP3212 photomultiplier. During experiments in liquid nitrogen a Large Area Avalanche Photodiode (LAAPD) was used as a photodetector. Measurements of light output, non-proportionality of the light yield and intrinsic resolution as a function of gamma-ray energies were performed at both temperatures. The non-proportionality for the two crystals, likely CaWO 4 , reveals temperature dependence, to reach the same values at LN2 temperature. Intrinsic energy resolution for both crystals was also changed at LN 2 comparing to the data collected at RT. The intrinsic energy resolution was improved below 100 keV and deteriorated for higher energies.
ISSN:1082-3654
2577-0829
DOI:10.1109/NSSMIC.2009.5402262