Full longitudinal acoustic mode (LAM) spectrum of an n-alkane: Comparison of observed and computed incoherent inelastic neutron scattering spectrum of n-octadecane

Stewart F. Parker, Dale A. Braden, John Tomkinson, Bruce S Hudson

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The incoherent inelastic neutron scattering spectrum of solid n-octadecane below 600 cm -1 is presented and compared with the results of a scaled HF ab initio calculation. Ten vibrations in the 300-550 cm -1 region, eight of which have not been previously observed, are easily assigned as longitudinal acoustic modes (LAMs). On the basis of the good agreement between calculated and observed modes in this region, the location of the lower frequency LAMs is postulated.

Original languageEnglish (US)
Pages (from-to)5955-5956
Number of pages2
JournalJournal of Physical Chemistry B
Issue number31
StatePublished - Jul 30 1998


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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