期刊
JOURNAL OF NUCLEAR MATERIALS
卷 478, 期 -, 页码 268-274出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2016.06.003
关键词
MgO; Ion irradiation; RBS/C; Irradiation damage
资金
- Conseil General de l'Essonne
- Campus France
- Universidad Autonoma de Madrid
The damage accumulation process in MgO single crystals under medium-energy heavy ion irradiation (1.2 MeV Au) at fluences up to 4 x 1014 cm(-2) has been studied at three different temperatures: 573, 773, and 1073 K. Disorder depth profiles have been determined through the use of the Rutherford back-scattering spectrometry in channeling configuration (RBS/C). The analysis of the RBS/C data reveals two steps in the MgO damage process, irrespective of the temperature. However, we find that for increasing irradiation temperature, the damage level decreases and the fluence at which the second step takes place increases. A shift of the damage peak at increasing fluence is observed for the three temperatures, although the position of the peak depends on the temperature. These results can be explained by an enhanced defect mobility which facilitates defect migration and may favor defect annealing. X-ray diffraction reciprocal space maps confirm the results obtained with the RBS/C technique. (C) 2016 Elsevier B.V. All rights reserved.
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