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Crystal structure and thermal expansion of CsCaI3:Eu and CsSrBr3:Eu scintillators.
- Source :
-
Journal of Crystal Growth . Jan2018, Vol. 481, p35-39. 5p. - Publication Year :
- 2018
-
Abstract
- The distorted-perovskite scintillator materials CsCaI 3 :Eu and CsSrBr 3 :Eu prepared as single crystals have shown promising potential for use in radiation detection applications requiring a high light yield and excellent energy resolution. We present a study using high temperature powder X-ray diffraction experiments to examine a deleterious high temperature phase transition. High temperature phases were identified through sequential diffraction pattern Rietveld refinement in GSAS II. We report the linear coefficients of thermal expansion for both high and low temperature phases of each compound. Thermal expansion for both compositions is greatest in the [0 0 1] direction. As a result, Bridgman growth utilizing a seed oriented with the [0 0 1] along the growth direction should be used to mitigate thermal stress. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CRYSTAL structure
*THERMAL expansion
*SCINTILLATORS
*PEROVSKITE
*X-ray diffraction
Subjects
Details
- Language :
- English
- ISSN :
- 00220248
- Volume :
- 481
- Database :
- Academic Search Index
- Journal :
- Journal of Crystal Growth
- Publication Type :
- Academic Journal
- Accession number :
- 126185653
- Full Text :
- https://doi.org/10.1016/j.jcrysgro.2017.10.031