Temperature response and thermoluminescence of SrI2:Eu2+ single crystals

Single crystal of strontium iodide doped with 1% europium (SrI 2 : 1% Eu 2+ ) was grown by Vertical Gradient Freeze technique. Temperature response and thermoluminescence glow curves of SrI 2 : 1% Eu 2+ were studied. UV excitation spectrum of SrI 2 : 1%Eu 2+ at 298 K shows a broad excitation peak at...

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Bibliographic Details
Main Authors: Kan Yang, Zhuravleva, M, Szupryczynski, P, Melcher, C L
Format: Conference Proceeding
Language:English
Subjects:
Crystals
Energy resolution
Strontium
Temperature measurement
Thermal quenching
Thermoluminescence
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Summary:Single crystal of strontium iodide doped with 1% europium (SrI 2 : 1% Eu 2+ ) was grown by Vertical Gradient Freeze technique. Temperature response and thermoluminescence glow curves of SrI 2 : 1% Eu 2+ were studied. UV excitation spectrum of SrI 2 : 1%Eu 2+ at 298 K shows a broad excitation peak at 367 nm. At ~24 K, additional excitation peaks appear in the range of 265 nm and 285 nm. UV excited emission spectra were measured as a function of temperature. Results indicates the thermal quenching of Eu emission starts from ~400 K. The thermoluminescence curve indicates the elimination of the charge trap at 50 K may significantly expedite the scintillation process thus decrease the scintillation decay time of SrI 2 :Eu.
ISSN:1082-3654
2577-0829
DOI:10.1109/NSSMIC.2010.5873760