Phonon Measurements and Model Calculations for Naphtalene-d8

Gordon A. Mackenzie, G. S. Pawley, O. W. Dietrich

    Research output: Contribution to journalJournal articleResearchpeer-review


    Measurements of the phonon dispersion curves in naphthalene-d8, (deuteration >99%), taken at 77K are presented. The experiments were done on two crystals, using the triple-axis neutron spectrometers at the medium flux reactor, DR3 at Riso. Most of the external or lattice modes have been measured and assigned, but a small proportion of the modes were too weakly scattering to be positively identified. A least-squares minimisation procedure was used to improve the fit between the model and experiment. The agreement obtained is given by chi =2.7. These measurements show that on a high-flux reactor it will be possible to identify and measure all the lattice modes for crystals of the complexity of naphthalene.
    Original languageEnglish
    JournalJournal of Physics C: Solid State Physics
    Issue number19
    Pages (from-to)3723-3725
    Publication statusPublished - 1977


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