Investigation of the unique degradation phenomenon observed in CsSrBr3: Eu 5% scintillator crystals

S. S. Gokhale; M. Loyd; L. Stand; A. Lindsey; S. Swider; M. Zhuravleva; C. L. Melcher

doi:10.1016/j.jcrysgro.2016.03.003

Investigation of the unique degradation phenomenon observed in CsSrBr₃: Eu 5% scintillator crystals

S. S. Gokhale, M. Loyd, L. Stand, A. Lindsey, S. Swider, M. Zhuravleva, C. L. Melcher

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

CsSrBr₃: Eu 5% is a promising compound scintillator for radiation detection and imaging applications. Light output and energy resolution measured for a crystal of volume 5×5×5 mm³ were 55,000±2000 ph/MeV and 5.6% at 662 keV respectively which is a significant improvement over previous reports. The hygroscopicity of the compound and the tendency of the scintillator crystals to degrade when exposed to the atmosphere necessitate the proper encapsulation of the crystals. It was observed that unlike other hygroscopic scintillator crystals CsSrBr₃ undergoes a unique degradation while encapsulated in mineral oil. The light output of the crystal decreases over time, but there is no visually observed physical degradation of the crystal. This degradation is a reversible process wherein a degraded crystal can be subjected to annealing in vacuum in order to restore its original performance.

Original language	English
Pages (from-to)	89-94
Number of pages	6
Journal	Journal of Crystal Growth
Volume	452
DOIs	https://doi.org/10.1016/j.jcrysgro.2016.03.003
State	Published - Oct 15 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

A2. Growth from melt
B1. Halides
B1. Rare earth compounds
B3. Scintillators

Access to Document

10.1016/j.jcrysgro.2016.03.003

Cite this

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title = "Investigation of the unique degradation phenomenon observed in CsSrBr3: Eu 5% scintillator crystals",

abstract = "CsSrBr3: Eu 5% is a promising compound scintillator for radiation detection and imaging applications. Light output and energy resolution measured for a crystal of volume 5×5×5 mm3 were 55,000±2000 ph/MeV and 5.6% at 662 keV respectively which is a significant improvement over previous reports. The hygroscopicity of the compound and the tendency of the scintillator crystals to degrade when exposed to the atmosphere necessitate the proper encapsulation of the crystals. It was observed that unlike other hygroscopic scintillator crystals CsSrBr3 undergoes a unique degradation while encapsulated in mineral oil. The light output of the crystal decreases over time, but there is no visually observed physical degradation of the crystal. This degradation is a reversible process wherein a degraded crystal can be subjected to annealing in vacuum in order to restore its original performance.",

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author = "Gokhale, {S. S.} and M. Loyd and L. Stand and A. Lindsey and S. Swider and M. Zhuravleva and Melcher, {C. L.}",

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T2 - Eu 5% scintillator crystals

AU - Gokhale, S. S.

AU - Loyd, M.

AU - Stand, L.

AU - Lindsey, A.

AU - Swider, S.

AU - Zhuravleva, M.

AU - Melcher, C. L.

PY - 2016/10/15

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AB - CsSrBr3: Eu 5% is a promising compound scintillator for radiation detection and imaging applications. Light output and energy resolution measured for a crystal of volume 5×5×5 mm3 were 55,000±2000 ph/MeV and 5.6% at 662 keV respectively which is a significant improvement over previous reports. The hygroscopicity of the compound and the tendency of the scintillator crystals to degrade when exposed to the atmosphere necessitate the proper encapsulation of the crystals. It was observed that unlike other hygroscopic scintillator crystals CsSrBr3 undergoes a unique degradation while encapsulated in mineral oil. The light output of the crystal decreases over time, but there is no visually observed physical degradation of the crystal. This degradation is a reversible process wherein a degraded crystal can be subjected to annealing in vacuum in order to restore its original performance.

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