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Neutron irradiation and post annealing effect on sapphire by positron annihilation
Han, JC; Zhang, HL; Zhang, MF; Wang, BY; Li, ZX; Xu, CH; Guo, HX; Wang BY(王宝义); Li ZX(李卓昕)
2010
发表期刊APPLIED RADIATION AND ISOTOPES
卷号68期号:9页码:1699-1702
通讯作者[Han, Jie-cai ; Zhang, Hai-liang ; Zhang, Ming-fu ; Xu, Cheng-hai ; Guo, Huai-xin] Harbin Inst Technol, Ctr Composite Mat, Harbin 150080, Peoples R China ; [Wang, Bao-yi ; Li, Zhuo-xin] CAS, Inst High Energy Phys, Beijing 100088, Peoples R China
文章类型Article
摘要Sapphire single crystals grown by an improved Kyropoulos-like method are irradiated by fast neutron flux. The irradiated doses of neutron are 10(18) and 10(19) n/cm(2). The infrared transmission spectra of sapphire were studied before and after irradiation. The irradiated samples were annealed at 200, 400, 600, 800 and 1000 degrees C for 10 min in ambient atmosphere. Positron annihilation studies have been carried out before and after neutron irradiation. The experimentally measured positron lifetime in the pristine specimen is 143 ps. There were aluminum vacancies produced in sapphire crystals after neutron irradiation. The positron lifetime increased with the dose of neutron flux. A longer value tau(2) was found after annealing at 600 degrees C, which indicated vacancies were aggregated with each other. The second long-time component tau(2) has been found to increase with the annealing temperature. There was almost no change in peak position of the CDB spectra after neutron irradiation and isothermal annealing. The chemical environment of core in sapphire did not change greatly after neutron irradiation. (C) 2010 Elsevier Ltd. All rights reserved.
关键词Sapphire Neutron irradiation Post annealing Positron lifetime CDB
学科领域Chemistry; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging
DOI10.1016/j.apradiso.2010.04.019
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语种英语
WOS研究方向Chemistry ; Nuclear Science & Technology ; Radiology, Nuclear Medicine & Medical Imaging
WOS类目Chemistry, Inorganic & Nuclear ; Nuclear Science & Technology ; Radiology, Nuclear Medicine & Medical Imaging
WOS记录号WOS:000279415800017
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/239486
专题多学科研究中心
核技术应用研究中心
作者单位中国科学院高能物理研究所
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Han, JC,Zhang, HL,Zhang, MF,et al. Neutron irradiation and post annealing effect on sapphire by positron annihilation[J]. APPLIED RADIATION AND ISOTOPES,2010,68(9):1699-1702.
APA Han, JC.,Zhang, HL.,Zhang, MF.,Wang, BY.,Li, ZX.,...&李卓昕.(2010).Neutron irradiation and post annealing effect on sapphire by positron annihilation.APPLIED RADIATION AND ISOTOPES,68(9),1699-1702.
MLA Han, JC,et al."Neutron irradiation and post annealing effect on sapphire by positron annihilation".APPLIED RADIATION AND ISOTOPES 68.9(2010):1699-1702.
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