Vibrational dependence of the rotational, spin-orbit splitting, and lambda-doubling parameters in the C″⁵Π_ui state of N₂

Authors: Pirali, O.; Tokaryk, D. W.; Vervloet, M.

Source: Canadian Journal of Physics, Volume 87, Number 5, May 2009 , pp. 601-606(6)

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Abstract:

We have recorded the high-resolution emission spectrum of the Herman infrared band (C″⁵Π_ui-A′⁵Σ_g⁺) system of N₂ in the 8000-15000cm^-1 range from an experimental set-up coupling a corona discharge with a supersonic expansion. The analysis of four new bands has permitted us to determine spectroscopic parameters of the v′ = 0 and v′ = 1 vibrational levels of the C″⁵Π_ui state and to study the vibrational dependence of the molecular parameters over the range v′ = 0 to v′ = 4. In particular, the values of the spin-orbit coupling and the Λ-doubling parameters are discussed.

Nous avons enregistré le spectre d'émission à haute résolution des bandes infrarouges du système de Herman (C″⁵Π_ui-A′⁵Σ_g⁺) de N₂ dans la gamme spectrale 8000-15000cm^-1. Le dispositif expérimental associe une décharge corona à une expansion supersonique. L'analyse de quatre nouvelles bandes nous a permis de déterminer avec précision les paramètres spectroscopiques des niveaux vibrationnels v′ = 0 et v′ = 1 de l'état C″⁵Π_ui ainsi que d'étudier la dépendance vibrationnelle des paramètres moléculaires entre v′ = 0 et v′ = 4. Une attention particulière a été portée sur les valeurs des paramètres de couplage spin-orbite et dédoublement-Λ.

Document Type: Research article

Publication date: 2009-05-01

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