氟基质中Gd^(3+)离子真空紫外光谱的理论研究

Theoretical Adscription of Vacuum Ultraviolet Spectra of Gd^(3+) Ion in Fluorides

本文将4f n组态的配位场理论模型拓展到4f^(n-1)5d组态,运用配位场理论方法获得了Gd^(3+)离子的4f^65d组态的光谱项和光谱支项,并对Gd^(3+)离子在LiGdF_4和GdF_3晶体中的真空紫外跃迁光谱进行了合理的理论解释,将谱图中的宽峰归属为Gd^(3+)离子的基态能级~8S_(7/2)向4f^65d激发态能级~8P_(9/2)间的自旋允许跃迁,为4f^(n-1)5d组态的实验研究提供了一定的理论依据,同时也为4f^(n-1)5d组态的理论研究提供了一种方法。

The method of ligand field theory of 4fn configuration was extended to 4fn-15 d configuration,and spectral terms and J-spectral multiplet of the 4f65 d configuration of Gd3＋were obtained with the method of ligand field theory. The vacuum ultraviolet transition spectra of Gd3＋in LiGdF4 and GdF3 crystals were theoretically interpreted,and the wide band in excitation and emission spectra were assigned to the spin-allowed transitions from the ground level（8S7/2） to excitation level（8P9/2） of the 4f65 d configuration of Gd3＋ ion. It provided a theoretical basis for the experimental study of the 4fn-15 d configuration,it also provided a method for the theoretical study of the 4fn-15 d configuration.