Study of resonance interactions in polyatomic molecules on the basis of highly accurate experimental data: Set of strongly interacting Bands ν10(B1), ν7(B2), ν4(A2), ν8(B2), ν3(A1)and ν6(B1) of CH2=CD2

O. N. Ulenikov, O. V. Gromova, E. S. Bekhtereva, K. B. Berezkin, N. V. Kashirina, T. L. Tan, C. Sydow, C. Maul, S. Bauerecker

Research output: Contribution to journalArticle

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Abstract

The highly accurate (experimental accuracy in line positions ~(1-3)×10-4cm-1) FTIR ro-vibrational spectra of CH2=CD2in the region of 600-1300 cm-1, where the fundamental bands ν10, ν7, ν4, ν8, ν3, and ν6are located, were recorded and analyzed with the Hamiltonian model which takes into account resonance interactions between all six studied bands. About 12 200 ro-vibrational transitions belonging to these bands (that is considerably more than it was made in the preceding studies for the bands ν10, ν7, ν8, ν3and ν6; transitions belonging to the ν4band were assigned for the first time) were assigned in the experimental spectra with the maximum values of quantum numbers Jmax./Kamax. equal to 31/20, 46/18, 33/11, 50/26, 44/20 and 42/21 for the bands ν10, ν7, ν4, ν8, ν3, and ν6, respectively. On that basis, a set of 133 vibrational, rotational, centrifugal distortion and resonance interaction parameters was obtained from the weighted fit. They reproduce values of 3920 initial "experimental" ro-vibrational energy levels (positions of about 12 200 experimentally recorded and assigned transitions) with the rms error drms=2.3×10-4cm-1.

Original languageEnglish
Pages (from-to)14-28
Number of pages15
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume180
DOIs
Publication statusPublished - 1 Sep 2016

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Keywords

  • CH2=CD2
  • High-resolution spectra
  • Spectroscopic parameters

ASJC Scopus subject areas

  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Radiation

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