用Fourier变换光谱仪和特制的多次反射吸收池在0.01cm~(-1)分辨率上记录了硅烷的(3000),(4000)和(5000)伸缩振动泛频带的光谱.这些光谱显示出了清晰的对称陀螺转动结构,它们正是理论预言的球陀螺分子在局域模极限时的行为,从而为详细研究分子的局域模的转动结构提供了首次极好的机会.文中并用局域模和简正模两种图象对这些谱带做出了解释和分析,讨论了在分子中单键激发后的动力学过程. Spectra of (3000), (4000) and (5000) stretching vibrational bands of silanes were recorded at a resolution of 0.01 cm -1 using a Fourier transform spectrometer and a special multi-reflection absorption cell. These spectra showed The clear gyroscope gyroscopes, which are precisely the behavior of the theoretically predicted gyroscopic molecules at the local mode limit, provide the first excellent opportunity to study the rotational structure of the local modes of molecules in detail. And normal mode two images of these bands were explained and analyzed, discussed in the molecule after the single-key excitation kinetic process.