Concentration Effects in Eu Doped SrI2

被引：97

作者：

Glodo, Jarek ^{[1
]}

van Loef, Edgar V. ^{[1
]}

Cherepy, Nerine J. ^{[2
]}

Payne, Stephen A. ^{[2
]}

Shah, Kanai S. ^{[1
]}

机构：

[1] Radiat Monitoring Devices, Watertown, MA 02472 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2010年 / 57卷 / 03期

关键词：

Gamma-ray spectroscopy; radiation trapping; scintillators; SrI2;

D O I：

10.1109/TNS.2009.2036352

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This study reports on effects of dopant concentration and crystal size on some of the scintillation properties of SrI:Eu2+. For example, the emission shifts to longer wavelengths as the dopant concentration is increased. It also results in scintillation decays getting slower: a 620 ns decay time constant observed for a small 0.5% Eu sample increases to 1650 ns for a 10% Eu sample. Similar changes in the time constant values were also observed when the crystal size was being increased. It also appears that larger samples yielded somewhat less light. These effects are attributed to radiation trapping, in which the scintillation light is multiple time absorbed and consequently emitted by the dopant.

引用

页码：1228 / 1232

页数：5

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