Radiation Damage and Recovery in Neutron-Irradiated MgO Crystal  

作　　者：Ruan Yongfeng Ma Pengfei Liu Jian Li Wenrun Liu Changlong 

机构地区：[1]School of Science, Tianjin University, Tianjin 300072, China School of Science, Tianjin University, Tianjin 300072, China School of Science, Tianjin University, Tianjin 300072, China School of Science, Tianjin University, Tianjin 300072, China School of Science, Tianjin University, Tianjin 300072, China

出　　处：《Journal of Rare Earths》2006年第z1期56-58,共3页稀土学报（英文版）

摘　　要：MgO single crystal was irradiated by neutron up to a dose of 5.74×1018 cm-2. The radiation damage and its recovery were studied by means of UV-VIS and EM spectroscopy. The results indicate that the irradiation generates large amount of optically detectable defects such as single anion vacancies (F+ center), anion divacancies (F2) and some higher order defects. Through isochronal annealing, these defects started a series of processes of diminishing and transforming, and finally all disappeared while annealing at 900 ℃. It seems that the absorption bands of 573 nm are resulted from a higher order and more complex aggregated center than that of 424, 451 nm bands.

关 键 词：MGO NEUTRON IRRADIATION defects absorption SPECTRA 

分 类 号：TL99[核科学技术—核技术及应用] O77[理学—晶体学]