High-resolution Raman spectra of solutions of C60in CS2reveal the presence of13C isotopes in the C60molecules. The observed frequency shifts for the high-energy Ag(2) totally symmetric mode can be explained in terms of first-order non-degenerate perturbation theory. Information on the frequencies of modes close to Ag(2) is obtained by studying the conditions under which a nondegenerate perturbation expansion is valid. This is done with the help of non- perturbative calculations based on first-principles and empirical vibrational models.
|Original language||English (US)|
|Number of pages||9|
|Journal||Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties|
|State||Published - Sep 1994|
ASJC Scopus subject areas
- Chemical Engineering(all)
- Physics and Astronomy(all)