Raman Phonon Spectra of Isotopic Mixed Naphthalene Crystals: Librational Exciton Model and the Amalgamation Limit
dc.contributor.author | Prasad, Paras N. | en_US |
dc.contributor.author | Kopelman, Raoul | en_US |
dc.date.accessioned | 2010-05-06T22:01:59Z | |
dc.date.available | 2010-05-06T22:01:59Z | |
dc.date.issued | 1972-07-15 | en_US |
dc.identifier.citation | Prasad, Paras N.; Kopelman, Raoul (1972). "Raman Phonon Spectra of Isotopic Mixed Naphthalene Crystals: Librational Exciton Model and the Amalgamation Limit." The Journal of Chemical Physics 57(2): 863-865. <http://hdl.handle.net/2027.42/70356> | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/70356 | |
dc.description.abstract | We present an experimental Raman study of lattice modes in neat and mixed (10%–90%) crystals of naphthalene‐h8 and naphthalene‐d8 at 100°K with 1 cm−1 resolution. The spectral features of the neat crystals are preserved in the heavily doped mixed crystals, with small shifts and broadenings characteristic of an amalgamation limit that assumes weakly coupled excitation bands in the restricted Frenkel‐Davydov limit. Rotation‐translation interaction does not affect the mixed crystal spectra, thus making the Raman technique uniquely suited for the investigation of the librational (rotational) phonon band structure. The evidence is against localized or pseudolocalized phonons in these isotopic mixed crystals. | en_US |
dc.format.extent | 3102 bytes | |
dc.format.extent | 219537 bytes | |
dc.format.mimetype | text/plain | |
dc.format.mimetype | application/pdf | |
dc.publisher | The American Institute of Physics | en_US |
dc.rights | © The American Institute of Physics | en_US |
dc.title | Raman Phonon Spectra of Isotopic Mixed Naphthalene Crystals: Librational Exciton Model and the Amalgamation Limit | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48104 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/70356/2/JCPSA6-57-2-863-1.pdf | |
dc.identifier.doi | 10.1063/1.1678330 | en_US |
dc.identifier.source | The Journal of Chemical Physics | en_US |
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dc.identifier.citedreference | Our naphthalene‐d8naphthalene‐d8 does not show a band at about 160 cm−1160cm−1 (not even at room temperature), in contrast to that reported by A. Bree and R. A. Kydd, Spectrochim. Acta 26a, 1791 (1970).We do, sometimes, see some weak bands at about 40 cm−140cm−1 in both neat and mixed crystals. These, we feel, are related to the pure crystal phonon density‐of‐states peaks and will be discussed further in the future. [R. Kopelman, F. W. Ochs and P. N. Prasad, (unpublished).] | en_US |
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dc.identifier.citedreference | In contrast to some suggestions by D. M. Hanson, J. Chem. Phys. 51, 5063 (1969).We feel now that these data should be interpreted in terms of the host phonon density‐of‐states peaks [R. Kopelman, F. W. Ochs and P. N. Prasad, (unpublished)], in agreement with the present views of D. M. Hanson (private communication). Compare also G. Dolling and B. M. Powell, Proc. Roy. Soc. (London) A319, 209 (1970). | en_US |
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dc.owningcollname | Physics, Department of |
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