Abstract
The spectrum of intermolecular excitations in solid C60 and C70 is investigated by neutron time-of-flight spectroscopy. The quasielastic scattering above the ordering transition is studied in detail and compared to a rotational diffusion model. Below the transition the scattering spectra have essentially a three peak structure with a prominent libronic excitation near ±2 meV for both fullerenes. A detailed analysis gives evidence for a broader distribution of librational modes with an additional pronounced maximum near 5 meV.
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Renker, B., Gompf, F., Heid, R. et al. Neutron scattering study of intermolecular excitations in solid C60 and C70 . Z. Physik B - Condensed Matter 90, 325–329 (1993). https://doi.org/10.1007/BF01433056
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DOI: https://doi.org/10.1007/BF01433056