ar X iv : c on d - m at / 9 41 10 32 v 1 7 N ov 1 99 4 Vibrational Study of 13 C - enriched C 60 Crystals
نویسنده
چکیده
The infrared (IR) spectrum of solid C60 exhibits many weak vibrational modes. Symmetry breaking due to C isotopes provides a possible route for optically activating IR-silent vibrational modes. Experimental spectra and a semi-empirical theory on natural abundance and C-enriched single crystals of C60 are presented. By comparing the experimental results with the theoretical results, we exclude this isotopic activation mechanism from the explanation for weakly active fundamentals in the spectra. PACS: 74.30.-j, 74.30.Jw, 74.70.Wz Typeset using REVTEX
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