CS2在Ｃ6H6中的弱费米共振特性及对Bertran公式修正

通过测量CS₂在C₆H₆中不同浓度的拉曼光谱，观察到了纯CS₂与溶液中的v₁—2v₂费米共振明显不同.用Bertran方程，计算了费米共振特性参数.结果表明，随着CS₂浓度降低，两光谱强度比R=I_v1/I_2v2减小，耦合系数W增加，其他参数 关键词： 拉曼光谱 费米共振 溶剂效应 二硫化碳

Amendment to bertran equation and the weak Fermi resonance characteristic of CS2 in C6H6

The Raman spectra of CS₂ in C₆H₆ is messured and the Fermi resonance of v₁—2v₂ in solution and in pure CS₂ is obvionsly different.The characteristic parameters are calculated by Berttern equation.It was found that with the concentration of CS₂ declining,the ratio of the spectral intensity （R=Ｉ₆₅₅/I₇₉₆） decreases and the coupling coefficient （Ｗ） raises, and the other parameters also change correspondingly.　The analysis shows that dissipation coefficient of v⁰₁ of CS₂ is affected by the concentration of C₆H₆. Asymmetric frequency shift of v⁰₁ and 2v⁰₂ are observed in experiment,which is explained by amending the Bertran theory. This report has reference value for the molecule spectrum certification and the understanding and use of Fermi resonance theory.