摘要
本文利用吸收光谱法、光致发光光谱法和拉曼光谱法对中子辐照的α-Al2O3进行研究。吸收光谱表明,中子辐照除产生F2、F2+、F22+和F3色心外,还能产生[Al-O]3-色心,它对应着325 nm和638 nm两个吸收峰,且具有较低的热稳定性,经300℃退火后消失。光致发光谱法除了检测到F2、F2+和F22+色心对应的发光峰外,还检测到625nm和657 nm发光峰。625 nm发光峰可能对应着高剂量中子辐照下特有的发光中心。657 nm发光峰是经800℃处理后唯一存在的发光峰,它可能来自于反位铝缺陷(AlO)。此外,拉曼光谱显示该剂量的中子辐照不能导致明显的拉曼峰频移和展宽。
In this paper, the neutron-irradiated α-Al2O3 was analyzed by the optical absorption spectroscopy, photoluminescence （PL） spectroscopy, and Raman spectroscopy. The optical absorption spectra showed that neutron irradiation can induce the formation of [ Al-O]^3- color center which possesses 325 nm and 638 nm peaks, in addition to F_2, F_2^＋, F_2^2＋, and F3 color centers. The [ Al-O ]^3- color center disappears after the 300 ℃ thermal treatment. PL spectra present the interesting 625 nm and 657 nm peaks and the peaks related to F_2, F_2^＋ , and F_2^＋. The formation of 625 nm luminescence peak may be under high dose neutron irradiation. Only the 657 nm peak can survive after 800 ℃ annealing process and might originate from antisite Al defects （ Alo）. The Raman peaks of neutron irradiated sample show no obvious frequency shift and broadening.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2012年第4期834-839,共6页
Journal of Synthetic Crystals
关键词
AL2O3
中子辐照
色心
光学性质
Al2O3
neutron irradiation
color center
optical property
