X-ray and gamma irradiation effects on dipole defects in CaF2: La, Yb, Al

被引：1
|
作者：
Arantes, L. O. [1 ]
Ferreira, R. B. [1 ]
Carvalhaes, R. P. M. [1 ]
Blak, A. R. [1 ]
机构：
[1] Univ Sao Paulo, Inst Fis, Dept Fis Nucl, BR-05315970 Sao Paulo, Brazil
来源：
RADIATION MEASUREMENTS | 2008年 / 43卷 / 2-6期
关键词：
thermally stimulated depolarization currents; calcium fluoride; static computer simulation;
D O I：
10.1016/j.radmeas.2007.09.020
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：
Impurity-interstitial dipoles in calcium fluoride solutions with Al3+, Yb3+ and La3+ fluorides were studied using the thermally stimulated depolarization current (TSDC) technique. The dipolar complexes are formed by substitutional trivalent ions in Ca2+ sites and interstitial fluorine in nearest neighbor sites. The relaxations observed at 150 K are assigned to dipoles nnR(S)(3+)- F-i(-) (R-S = La or Yb). The purpose of this work is to study the processes of energy storage in the fluorides following X-ray and gamma irradiation. Computer modelling techniques are used to obtain the formation energy of dipole defects. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：227 / 230
页数：4
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