化学
激发
吸收边
带隙
原子轨道
原子物理学
吸收光谱法
离子
化学计量学
分析化学(期刊)
谱线
吸收(声学)
分子物理学
材料科学
凝聚态物理
物理化学
物理
天文
电子
复合材料
有机化学
量子力学
色谱法
作者
A. Garcia,F. Guillen,Claude Fouassier
标识
DOI:10.1016/0022-2313(85)90025-0
摘要
The excitation spectra of the Nd3+, Sm3+, Dy3+, Ho3+, Er3+ and Tm3+ emission in the sodium-compensated CaGa2S4 host lattice, a sulfide with wide band gap, contain an intense band below the absorption edge. Comparison of the energy of its maximum with thermodynamic data and correlations to Jørgensen's refined spin-pairing theory predictions allow one to ascribe this band to a charge transfer transition ending onto 4f orbitals. The irregular variation within the rare earth series contrasts with the monotonic variation of the absorption edge in stoichiometric rare earth sulfides (e.g. NaLnS2), associated with interband transitions.
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