A novel method for investigating optically stimulated luminescence in scintillators

被引：1

作者：

Jensen, Mads L. ^{[1
]}

Turtos, Rosana M. ^{[1
]}

Julsgaard, Brian ^{[1
,2
]}

Schulz, Volkmar ^{[3
,4
,5
]}

Balling, Peter ^{[1
,2
]}

Gundacker, Stefan ^{[3
]}

机构：

[1] Aarhus Univ, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus, Denmark

[2] Aarhus Univ, Interdisciplinary Nanosci Ctr, Gustav Wieds Vej 14, DK-8000 Aarhus, Denmark

[3] Rhein Westfal TH Aachen, Inst Expt Mol Imaging, Dept Phys Mol Imaging Syst, Forckenbeckstr 55, D-52074 Aachen, Germany

[4] Rhein Westfal TH Aachen, Phys Inst B 3, Otto-Blumenthal-Str, D-52074 Aachen, Germany

[5] Fraunhofer Inst Digital Med MEVIS, Forckenbeckstr 55, D-52074 Aachen, Germany

来源：

JOURNAL OF LUMINESCENCE | 2022年 / 251卷

关键词：

Optically stimulated luminescence; Scintillation; Scintillator characterization; Dosimetry; LYSO; Ce; OSL; RAY;

D O I：

10.1016/j.jlumin.2022.119237

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Optically stimulated luminescence (OSL) is a known property in many scintillators, and investigating the branching ratio of thermalized carriers to this photon-emission mechanism could aid both scintillator develop-ment and OSL-based dosimetry. We present a novel method for determining the branching ratio of thermalized carriers to OSL in scintillators while monitoring the energy deposition from 511 keV gamma photons on an event -by-event basis. We demonstrate the method using a cerium-doped lutetium oxyorthosilicate (LYSO:Ce) crystal, and validate that the observed signal indeed originates from OSL photons by estimating the lifetime of the OSL traps, which is consistent with values found in the literature. We report a branching ratio of thermalized carriers to the OSL traps in LYSO:Ce of (1.0 +/- 0.2)% upon excitation with 511 keV gamma photons, using a one-trap-one -recombination-center model.

引用

页数：6

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