Heavy-ion irradiation of pyrochlore oxides:: Comparison between low and high energy regimes

被引：55
|
作者：
Sattonnay, G. [1 ]
Moll, S. [2 ]
Thome, L. [2 ]
Legros, C. [2 ]
Herbst-Ghysel, M. [1 ]
Garrido, F. [2 ]
Costantini, J. -M. [3 ]
Trautmann, C. [4 ]
机构：
[1] Univ Paris Sud, LEMHE ICMMO, F-91405 Orsay, France
[2] Univ Paris Sud, CNRS IN2P3, CSNSM, F-91405 Orsay, France
[3] CEA Saclay, DMN SRMA, F-91191 Gif Sur Yvette, France
[4] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2008年 / 266卷 / 12-13期
关键词：
ion irradiation; pyrochlores; X-ray diffraction;
D O I：
10.1016/j.nimb.2008.03.161
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Pyrochlore pellets with Gd-2(Ti2-xZrx)O-7 stoichiometry were irradiated with heavy ions at energies ranging from a few MeV to a few GeV in order to compare the effects of nuclear collisions and electronic excitations. The damage created by irradiation was characterized as a function of the ion fluence by X-ray diffraction. The structural modifications induced by irradiation were shown to depend on both the sample composition and the type of irradiation. At low energy (4 MeV Au ions), the susceptibility to radiation-induced amorphization exhibits a systematic decrease with increasing Zr content. At high energy (1.5 GeV Xe or 2.6 GeV U ions), similar structural changes are observed at much lower fluences. The lattice parameter increases for low energy irradiation, particularly in the case of amorphizable pyrochlores (Gd2Ti2O7 and Gd2TiZrO7), whereas it decreases for high energy irradiation. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：3043 / 3047
页数：5
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