Methyl Isocyanide Hot Bands in the Region 1300-1560 cm-1

J. Plíva, L.D. Le, Ghislain Blanquet, J. Walrand, R.A. Bernheim

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

The hot bands accompanying the fundamentals ν and ν of CHNC in the region 1300-1560 cm observed in high-resolution Fourier transform recordings complemented by diode laser spectra have been analyzed. The observed transitions comprise 16 subbands of the pair of perpendicular E-E bands ν + ν - ν and ν + 2ν - ν whose upper states form a Fermi dyad, 18 subbands of the A-E perpendicular bands ν + ν - ν/ν+ 2ν - ν with upper states forming another Fermi dyad, and 8 subbands of the bi-parallel E-E band ν + ν - ν. The anharmonic, Coriolis, and l-type interactions which couple these upper states with each other and with the states ν + 2ν, ν + 3ν, and ν + 3ν have been included in an 18 × 18 Hamiltonian matrix whose eigenvalues model the upper levels of the observed transitions. The values of 46 upper state spectroscopic constants and interaction constants have been adjusted by least squares to 950 observed lines. The results provide a reliable quantitative picture of the interacting states and yield accurate values for the spectroscopic constants of the various states and for the anharmonic constants X, X (g68), and X.
langue originaleAnglais
Pages (de - à)421-427
Nombre de pages7
journalJournal of molecular spectroscopy
Volume182
Numéro de publication2
étatPublié - 1 avr. 1997

Empreinte digitale

Hamiltonians
Semiconductor lasers
Fourier transforms
eigenvalues
semiconductor lasers
recording
interactions
methylisonitrile
high resolution

Citer ceci

Plíva, J. ; Le, L.D. ; Blanquet, Ghislain ; Walrand, J. ; Bernheim, R.A. / Methyl Isocyanide Hot Bands in the Region 1300-1560 cm-1. Dans: Journal of molecular spectroscopy. 1997 ; Vol 182, Numéro 2. p. 421-427.
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abstract = "The hot bands accompanying the fundamentals ν and ν of CHNC in the region 1300-1560 cm observed in high-resolution Fourier transform recordings complemented by diode laser spectra have been analyzed. The observed transitions comprise 16 subbands of the pair of perpendicular E-E bands ν + ν - ν and ν + 2ν - ν whose upper states form a Fermi dyad, 18 subbands of the A-E perpendicular bands ν + ν - ν/ν+ 2ν - ν with upper states forming another Fermi dyad, and 8 subbands of the bi-parallel E-E band ν + ν - ν. The anharmonic, Coriolis, and l-type interactions which couple these upper states with each other and with the states ν + 2ν, ν + 3ν, and ν + 3ν have been included in an 18 × 18 Hamiltonian matrix whose eigenvalues model the upper levels of the observed transitions. The values of 46 upper state spectroscopic constants and interaction constants have been adjusted by least squares to 950 observed lines. The results provide a reliable quantitative picture of the interacting states and yield accurate values for the spectroscopic constants of the various states and for the anharmonic constants X, X (g68), and X.",
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Plíva, J, Le, LD, Blanquet, G, Walrand, J & Bernheim, RA 1997, 'Methyl Isocyanide Hot Bands in the Region 1300-1560 cm-1', Journal of molecular spectroscopy, VOL. 182, Numéro 2, p. 421-427.

Methyl Isocyanide Hot Bands in the Region 1300-1560 cm-1. / Plíva, J.; Le, L.D.; Blanquet, Ghislain; Walrand, J.; Bernheim, R.A.

Dans: Journal of molecular spectroscopy, Vol 182, Numéro 2, 01.04.1997, p. 421-427.

Résultats de recherche: Contribution à un journal/une revueArticle

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AU - Plíva, J.

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AU - Blanquet, Ghislain

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PY - 1997/4/1

Y1 - 1997/4/1

N2 - The hot bands accompanying the fundamentals ν and ν of CHNC in the region 1300-1560 cm observed in high-resolution Fourier transform recordings complemented by diode laser spectra have been analyzed. The observed transitions comprise 16 subbands of the pair of perpendicular E-E bands ν + ν - ν and ν + 2ν - ν whose upper states form a Fermi dyad, 18 subbands of the A-E perpendicular bands ν + ν - ν/ν+ 2ν - ν with upper states forming another Fermi dyad, and 8 subbands of the bi-parallel E-E band ν + ν - ν. The anharmonic, Coriolis, and l-type interactions which couple these upper states with each other and with the states ν + 2ν, ν + 3ν, and ν + 3ν have been included in an 18 × 18 Hamiltonian matrix whose eigenvalues model the upper levels of the observed transitions. The values of 46 upper state spectroscopic constants and interaction constants have been adjusted by least squares to 950 observed lines. The results provide a reliable quantitative picture of the interacting states and yield accurate values for the spectroscopic constants of the various states and for the anharmonic constants X, X (g68), and X.

AB - The hot bands accompanying the fundamentals ν and ν of CHNC in the region 1300-1560 cm observed in high-resolution Fourier transform recordings complemented by diode laser spectra have been analyzed. The observed transitions comprise 16 subbands of the pair of perpendicular E-E bands ν + ν - ν and ν + 2ν - ν whose upper states form a Fermi dyad, 18 subbands of the A-E perpendicular bands ν + ν - ν/ν+ 2ν - ν with upper states forming another Fermi dyad, and 8 subbands of the bi-parallel E-E band ν + ν - ν. The anharmonic, Coriolis, and l-type interactions which couple these upper states with each other and with the states ν + 2ν, ν + 3ν, and ν + 3ν have been included in an 18 × 18 Hamiltonian matrix whose eigenvalues model the upper levels of the observed transitions. The values of 46 upper state spectroscopic constants and interaction constants have been adjusted by least squares to 950 observed lines. The results provide a reliable quantitative picture of the interacting states and yield accurate values for the spectroscopic constants of the various states and for the anharmonic constants X, X (g68), and X.

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