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dc.contributor.authorCHRISTIDES, Cen_US
dc.contributor.authorDENNIS, TJSen_US
dc.contributor.authorPRASSIDES, Ken_US
dc.contributor.authorCAPPELLETTI, RLen_US
dc.contributor.authorNEUMANN, DAen_US
dc.contributor.authorCOPLEY, JRDen_US
dc.date.accessioned2015-06-01T14:33:24Z
dc.date.issued1994-01-15en_US
dc.identifier.issn0163-1829en_US
dc.identifier.urihttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.49.2897
dc.identifier.urihttp://qmro.qmul.ac.uk/xmlui/handle/123456789/7543
dc.descriptionPMID: 10011126en_US
dc.descriptionPMID: 10011126 This work at the University of Sussex at supported by the Science and Engineering Research Council, U.K.
dc.descriptionPMID: 10011126 This work at the University of Sussex at supported by the Science and Engineering Research Council, U.K.
dc.descriptionPMID: 10011126 This work at the University of Sussex at supported by the Science and Engineering Research Council, U.K.en_US
dc.description.abstractWe report the results of neutron-diffraction and low-energy neutron-inelastic-scattering experiments on high-purity solid C-70 between 10 and 640 K. Thermal hysteresis effects are found to accompany structural changes both on cooling and on heating. The observed diffuse scattering intensity does not change with temperature. At 10 K broad librational peaks are observed at 1.82(16) meV [full width at half maximum=1.8(5) meV]. The peaks soften and broaden further with increasing temperature. At and above room temperature, they collapse into a single quasielastic line. At 300 K, the diffusive reorientational motion appears to be somewhat anisotropic, becoming less so with increasing temperature. An isotropic rotational diffusion model, in which the motions of adjacent molecules are uncorrelated, describes well the results at 525 K. The temperature dependence of the rotational diffusion constants is consistent with a thermally activated process having an activation energy of 32(7) meV.en_US
dc.description.sponsorshipThis work at the University of Sussex at supported by the Science and Engineering Research Council, U.K.en_US
dc.format.extent2897 - 2903 (7)en_US
dc.languageEnglishen_US
dc.language.isoenen_US
dc.publisherAMERICAN PHYSICAL SOCen_US
dc.relation.ispartofPHYSICAL REVIEW Ben_US
dc.subjectneutron-diffractionen_US
dc.subjectlow-energy neutron-inelastic-scatteringen_US
dc.subjectmolecular dynamicsen_US
dc.titleROTATIONAL-DYNAMICS OF SOLID C-70 - A NEUTRON-SCATTERING STUDYen_US
dc.typeArticle
dc.identifier.doi10.1103/PhysRevB.49.2897en_US
pubs.issue4en_US
pubs.notesNot knownen_US
pubs.publication-statusPublisheden_US
pubs.publisher-urlhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.49.2897en_US
pubs.volume49en_US


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