N2-shift coefficients in the ν3 band of 12CH4 at room temperature

Titre traduit de la contribution: Coefficients de déplacement dus à l'azote dans la bande ν3 du 12CH4 à température ambiante

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Using a dual beam diode-laser spectrometer, we have studied with accuracy the N2-shift coefficients in the P-branch of the υ3 band of methane. The experiments were performed at room temperature for 16 lines in the spectral range 2906-2948 cm-1 with J values between 7 and 11. Each line was recorded at four different nitrogen pressures ranging from 17 to 302 mbar. The collisional shifts were obtained by fitting to the experimental lineshape a Rautian-Sobel'Man profile that takes into account the Dicke narrowing. The shift coefficients were determined using a procedure where a non perturbed line of pure CH4 was simultaneously recorded with N2-shifted transitions. Finally, we give a comparison with previous published results.

langue originaleAnglais
Pages (de - à)7-10
journalJournal of molecular spectroscopy
Les DOIs
étatPublié - avr. 2014

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  • Methane
  • Diode-laser spectroscopy
  • Line shifts

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