Annealing recovery of neutron irradiated LiNbO3:Hf single crystals

被引：10
作者：
Marques, JG
Kling, A
de Jesus, CM
Soares, JC
da Silva, MF
Dieguez, E
Agullo-Lopez, F
机构：
[1] Univ Lisbon, CFNUL, P-1699 Lisbon, Portugal
[2] Inst Tecnol & Nucl, P-2685 Sacavem, Portugal
[3] Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1998年 / 141卷 / 1-4期
关键词：
LiNbO3; neutron-irradiation; perturbed angular correlation spectroscopy;
D O I：
10.1016/S0168-583X(98)00073-1
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Hf-doped LiNbO3 single crystals were irradiated with thermal neutrons to a fluence of 4 x 10(16) n/cm(2) and characterized by Rutherford Backscattering and Perturbed Angular Correlation (PAC) Spectroscopy after irradiation and after several annealing treatments. In crystals where I-If occupied both Li and Nb sites, the fraction in Nb sites is strongly reduced after irradiation as a result of the recoil induced by the (n, gamma) reaction with Hf. Annealing at 700 degrees C restored the initial distribution. The results are discussed in the framework of the Li and Nb vacancy models proposed in the literature for the defect structure of LiNbO3. (C) 1998 Elsevier Science B.V. All rights reserved.
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收藏
页码：326 / 331
页数：6
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