Line strengths, widths and shifts analysis of the 2ν2, ν24 and 2ν4 bands in 28SiH4, 29SiH4 and 30SiH4

O. N. Ulenikov, O. V. Gromova, E. S. Bekhtereva, N. I. Raspopova, E. A. Sklyarova, C. Sydow, K. Berezkin, C. Maul, S. Bauerecker

Research output: Contribution to journalArticlepeer-review

Abstract

The high resolution infrared spectra of SiH4 in its natural abundance were recorded with a Bruker IFS125 HR Fourier transform infrared spectrometer at an optical resolution of 0.003 cm−1 and analyzed in the region of 1600–2100 cm−1 where the first bending overtone 2ν2, 2ν4 and combinational ν24 bands are located. A line strength analysis of the 2018 (1636/211/171) experimentally recorded transitions of the 28SiH4, 29SiH4, and 30SiH4 species was made by the fit of their line shapes with the Hartmann-Tran profile and 9 effective dipole moment parameters (7/1/1 fitted parameters for the 28SiH4, 29SiH4 and 30SiH4 species, respectively) were obtained from the weighted fit which reproduce initial experimental line strengths of 28SiH4, 29SiH4 and 30SiH4 with the drms=3.65%, 3.77% and 3.46%. Self–broadening coefficients of 1064 lines (typically lying between (8 and 10)×10−2 cm−1·atm−1) and self–shift coefficients of 785 lines (typically lying between (5 and 10)×10−3 cm−1·atm−1) of all three isotopologues of silane were determined from the multi–spectrum analysis of these lines.

Original languageEnglish
Article number107683
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume270
DOIs
Publication statusPublished - Aug 2021

Keywords

  • Determination of spectroscopic parameters
  • High-resolution spectra of MSiH4 (M=28, 29, 30)
  • Line strengths of bands of MSiH4 (M=28, 29, 30)
  • Resonance interactions in spherical top molecules

ASJC Scopus subject areas

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

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