Residual gas analysis of volatile impurities in halide precursors for scintillator crystals

S. Swider; S. Motakef; A. Datta; W. M. Higgins

doi:10.1117/12.2034232

26 September 2013 Residual gas analysis of volatile impurities in halide precursors for scintillator crystals

S. Swider, S. Motakef, A. Datta, W. M. Higgins

Proceedings Volume 8852, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV; 88521P (2013) https://doi.org/10.1117/12.2034232
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Alkaline-earth halides can be made into bright scintillators if purity is maintained during synthesis and growth. In order to investigate precursor purity, beaded halide precursors were heated under vacuum and evolved gas was assessed by residual gas spectroscopy. These precursors included cesium chloride, lithium chloride, yttrium chloride, cerium chloride, strontium iodide, europium iodide, barium bromide, and europium bromide. Water and CO₂ desorption, sulfur release, argon release, and halide dissociation was observed in samples. Triply-oxidized precursors showed multiple paths to decomposition. The data inform approaches toward purification and growth.

Citation Download Citation

S. Swider, S. Motakef, A. Datta, and W. M. Higgins "Residual gas analysis of volatile impurities in halide precursors for scintillator crystals", Proc. SPIE 8852, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV, 88521P (26 September 2013); https://doi.org/10.1117/12.2034232

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