Scintillation kinetics and thermoluminescence of SrI2:Eu2+ single crystals

被引：22

作者：

Yang, Kan ^{[1
]}

Zhuravleva, Mariya ^{[1
]}

Melcher, Charles L. ^{[1
]}

机构：

[1] Univ Tennessee, Dept Mat Sci & Engn, Scintillat Mat Res Ctr, Sci & Engn Res Facil 301, Knoxville, TN 37996 USA

来源：

JOURNAL OF LUMINESCENCE | 2012年 / 132卷 / 07期

关键词：

SrI2; Thermoluminescence; Europium; Scintillator; Radiation detection; Scintillation kinetics; ELECTRON TRAPS; LUALO3-CE; MECHANISM;

D O I：

10.1016/j.jlumin.2012.02.040

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Single crystal of strontium iodide doped with 1% europium (SrI2:1% Eu2+) was grown by Vertical Gradient Freeze technique. UV excited emission spectra were studied as a function of temperature. Results indicate the thermal quenching of Eu2+ emission starts from similar to 400 K with a thermal activation energy of 0.39 eV. Gamma and UV excited decay measurements indicate that the scintillation decay time of SrI2:Eu2+ is longer than the lifetime of Eu2+ luminescence center in the SrI2 host. The thermoluminescence glow curve revealed a highly concentrated charge carrier trap at 50 K. Elimination of this trap is expected to enhance the energy migration of charge carriers and result in faster scintillation decay. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：1824 / 1829

页数：6

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