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Absorption spectrum analysis of uranium(III) formate

机译:甲酸铀(III)的吸收光谱分析

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摘要

The absorption spectrum of a thin film ofuranium(III) formate was measured at 4 and 300 K in the 4000-23000 cm~(-1) range. The energy levels of U~(3+) were assigned andfitted to a semiempirical Hamiltonian representing the combinedatomic and crystal-field interactions at the C_(3v) symmetry site.Ten energy level parameters were varied simultaneously in least-squares adjustments yielding a mean error of 23 cm~(-1). Theanalysis enabled the determination of the crystal-field parametersand the assignment of 49 crystal-field levels. The calculated totalsplitting of the ground level is equal to 520 cm~(-1). An analysisof the 5f~3 -> 5f~3 band intensities based on the Judd-Ofelt theoryis presented.
机译:甲酸铀(III)薄膜的吸收光谱在4和300 K下在4000-23000 cm〜(-1)范围内测量。分配了U〜(3+)的能级并将其拟合为半经验哈密顿量,该哈密顿量表示在C_(3v)对称位点的结合的原子和晶体场相互作用。十个能级参数在最小二乘平差中同时变化,从而产生平均误差23 cm〜(-1)。该分析使得能够确定晶体场参数以及分配49个晶体场能级。计算出的地平面总分裂等于520 cm〜(-1)。提出了基于Judd-Ofelt理论的5f〜3-> 5f〜3谱带强度分析。

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