Scintillation properties of CsI:In single crystals

Scintillation properties of CsI:In single crystals have been investigated. Scintillation yield of CsI:In measured with the 24μs integration time is around 27,000ph/MeV, reaching the saturation at 0.005mol% of the activator. However, luminescence yield of CsI:In is close to CsI:Tl scintillation cryst...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2014-10, Vol.761, p.13-18
Main Authors: Gridin, S., Belsky, A., Moszynski, M., Syntfeld-Kazuch, A., Shiran, N., Gektin, A.
Format: Article
Language:English
Subjects:
Accelerators
Afterglow
Chemical Sciences
Crystals
CsI:In
CsI:Tl
Decay
Engineering Sciences
Long decay time
Luminescence
Non-proportionality
Physics
Quenching
Scintillation
Scintillation properties
Single crystals
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Summary:Scintillation properties of CsI:In single crystals have been investigated. Scintillation yield of CsI:In measured with the 24μs integration time is around 27,000ph/MeV, reaching the saturation at 0.005mol% of the activator. However, luminescence yield of CsI:In is close to CsI:Tl scintillation crystals, which is around 60,000ph/MeV. This difference is explained by the presence of an ultra-long afterglow in CsI:In scintillation pulse. Thermoluminescence studies revealed a stable trap around 240K that is supposed to be related to millisecond decay components. The best measured energy resolution of (8.5±0.3)% was achieved at 24μs peaking time for a CsI sample doped with 0.01mol% of In. Temperature stability of CsI:In radioluminescence intensity was found to be remarkably high. Its X-ray luminescence yield remains stable up to 600K, whereafter thermal quenching occurs. The latter property gives CsI:In a potential to be used in well logging applications.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2014.05.111