Vibronic photoexcitation spectra of irradiated spinel MgOAl2O3(n=2) at low temperatures

分类： 物理学 >> 凝聚态:结构、力学和热性能 提交时间： 2017-03-26

Abu Zayed Mohammad Saliqur Rahman Xingzhong Cao Long Wei Baoyi Wang Shuaishuai Sun Ye Tao Qiu Xu

摘要： A vibronic photoexcitation band at approximately 230 nm was found at 13 K in reactor neutron- and electron-irradiated magnesiumaluminate spinel ( MgOAl2O3). Vibronic structure was found to be temperature dependent and became obscure at over 120K. Huang Rhys factor S and Debye Temperature D were estimated from the temperature dependence of the 230 nm band bycurve-fitting method using Debye approximation. Origin of the vibronic photoexcitation band was suggested as F center.

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