The isotropic spectrum of the CO2 Raman 23 overtone: A line-mixing band shape analysis at pressures up to several tens of atmospheres

I. A. Verzhbitskiy, A. P. Kouzov, F. Rachet, M. Chrysos

Результат исследований: Научные публикации в периодических изданияхстатья

4 Цитирования (Scopus)

Аннотация

A line-mixing shape analysis of the isotropic remnant Raman spectrum of the 23 overtone of CO2 is reported at room temperature and for densities, , rising up to tens of amagats. The analysis, experimental and theoretical, employs tools of non-resonant light scattering spectroscopy and uses the extended strong collision model (ESCM) to simulate the strong line mixing effects and to evidence motional narrowing. Excellent agreement at any pressure is observed between the calculated spectra and our experiment, which, along with the easy numerical implementation of the ESCM, makes this model stand out clearly above other semiempirical models for band shape calculations. The hitherto undefined, explicit -dependence of the vibrational relaxation rate is given. Our study intends to improve the understanding of pressure-induced phenomena in a gas that is still in the forefront of the news.

Язык оригиналаанглийский
Номер статьи224301
ЖурналJournal of Chemical Physics
Том134
Номер выпуска22
DOI
СостояниеОпубликовано - 14 июн 2011
Опубликовано для внешнего пользованияДа

Предметные области Scopus

  • Физика и астрономия (все)
  • Физическая и теоретическая химия

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