改变溶液折射率方法研究Fermi共振

Fermi共振现象在光谱分析中的谱线认证、归属有重要应用,然而,它蕴含的丰富物理规律、内容及研究方法亟待开发和研究.本文提出了一种改变溶液折射率研究Fermi共振的方法,该方法以Onsager电介质极化理论为依据,利用分子在溶液中的Raman散射强度(散射系数)随溶液折射率的变化来研究Fermi共振规律.该方法不仅能给出Fermi共振各参数间及与溶液折射率之间的关系,而且发现了Fermi共振双峰的非对称移动、倍频的基频也受Fermi共振调谐等现象.为全面认识Fermi共振规律提供了一种研究方法.

Study of Fermi resonance using the method of varying solution refractive index

Fermi resonance (FR) plays an important role in the spectral line identification and assignment in spectral analysis. It contains a wealth of physical laws which are urgently needed for research. In the present paper, we propose a new method of varying the refractive index of the solution to study the FR, which is based on the model of Onsager. The basic principle of this method is to use Raman scattering intensity (Raman scattering coefficient) changing with the refractive index of solution to study the FR. With this method we not only can give the relationship between the FR parameters and the refractive index of solution, but also find new spectrum phenomena (including the asymmetric shift of Fermi doublet and the FR tuned fundamental freguency of the overtone). In this article we provide a new research method to study the FR.