摘要
测量了２８４～１０Ｋ范围内Ｃ６０的拉曼谱，作出了拉曼谱线的强度～温度曲线。这些曲线都在一级相变点２５０Ｋ附近呈现突变；Ａｇ模谱线的强度及其变化都显著大于Ｈｇ的；１４７０、４９８ｃｍ－１二者的曲线起伏趋势完全相反。因此，作者认为，Ｃ６０分子内模振动以径向振动为主，两个Ａｇ模之间存在竞争机制；而且预计，在相变点附近，光学非线性现象更显著。
The Raman spectra of the solid C 60 at 284￣10 K were measured, and the intensity temperature curves were illustrated. For all these curves, the mutation appeared at the first order phase transition temperature 250 K. The intensity and its variation of A g mode were higher than that of H g. For the curves of 1470 and 498 cm -1 , its fluctuatory tendencies were opposite, one was rising just other was decreasing. It is considered that the radial vibrations were the major motions for inner mode vibrations of molecule, and there were some competitive function between two A g modes. The nonlinear optical effect near phase transition temperature would br more obvious.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1997年第11期1509-1513,共5页
Acta Optica Sinica
基金
江西省自然科学基金
关键词
拉曼谱
低温
强度变化
碳60
光学非线性
C 60 , Raman spectra, low temperature, variation of intensity.
