RESONANT X-RAY-EMISSION SPECTROSCOPY IN DY COMPOUNDS
RESONANT X-RAY-EMISSION SPECTROSCOPY IN DY COMPOUNDS
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DOI：
10.1143/jpsj.63.2780
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发表时间：
1994-07-01
影响因子：
1.7
通讯作者：
KOTANI, A
中科院分区：
文献类型：
--
作者：
TANAKA, S;OKADA, K;KOTANI, A
基于考虑多重态耦合效应的相干二阶光学公式，对Dy化合物L3-XANES（L3-XANES）边前区的L3-M5 X射线激发谱进行了理论研究.激发光谱的光谱增宽由M5芯空穴寿命决定，不受L3芯空穴寿命的影响。在激发光谱中可以看到由2 p →> 4f四极跃迁引起的L3边的精细边前结构，而这种结构在常规XANES中是不可见的，这与最近的实验结果一致。阐明了激发谱被看作吸收谱的条件。还计算了L3边附近不同入射光子能量的共振X射线发射谱。
The excitation spectrum of the L3-M5 X-ray emission of Dy compounds in the pre-edge region of Dy L3 X-ray absorption near edge structure (L3-XANES) is theoretically investigated based upon the coherent second order optical formula with multiplet coupling effects. The spectral broadening of the excitation spectrum is determined by the M5 core hole lifetime, being free from the L3 core hole lifetime. The fine pre-edge structure of the L3 edge due to the 2p --> 4f quadrupole transition can be seen in the excitation spectrum, while this structure is invisible in the conventional XANES, in agreement with the recent experimental results. We clarify the conditions for the excitation spectrum to be regarded as the absorption spectrum with a smaller width. The resonant X-ray emission spectra for various incident photon energies around the L3 edge are also calculated.