Structure sensitive investigations on luminescence centres in Mn-activated LiBaF3 dosimeters

被引：4

作者：

Henke, Bastian ^{[1
]}

Rogulis, Uldis ^{[1
,2
]}

Schweizer, Stefan ^{[1
]}

机构：

[1] Univ Gesamthsch Paderborn, Fac Sci, Dept Phys, D-33098 Paderborn, Germany

[2] Latvian State Univ, Inst Solid State Phys, LV-1063 Riga, Latvia

来源：

RADIATION MEASUREMENTS | 2008年 / 43卷 / 2-6期

关键词：

LiBaF3; Mn-doping; radiation defects; optically detected magnetic resonance;

D O I：

10.1016/j.radmeas.2007.09.019

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Prior to x-irradiation the photoluminescence (PL) of Mn-activated LiBaF3 shows a Mn2+ emission band at 710 nm the corresponding excitation hands are between 210 and 620 nm. After x-irradiation the PL emission spectrum shows a hand peaking at about 610 nm which is tentatively assigned to a perturbed Mn2+ emission; the intensity of all PL emission bands is increased. Structure sensitive investigations on the radiation-induced emission hand were done by detecting electron paramagnetic resonance (EPR) induced changes in the integral PL emission at a temperature of 1.5 K. The analysis of the angular dependent PL-EPR spectra, recorded for different orientations of the magnetic field, yielded that the 610 nm luminescence band is due to an excited triplet state (S = 1) of a Mn-related centre with the z-axis of the fine structure tensor close to a < 110 > direction. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：319 / 322

页数：4

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