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Fourier transform emission spectroscopy of a He/N[sub 2] supersonic jet in the 2-[mu]m region: [sup 1]II[sub g] [r arrow] a[prime][sup 1][Sigma][sub u][sup [minus]] and w[sup 1][Delta][sub u] [r arrow] a[sup 1]II[sub g] systems of the [sup 14]N[sub 2] molecule

Journal Article · · Journal of Molecular Spectroscopy; (United States)
;  [1];  [2]
  1. Univ. Claude Bernard Lyon, Villeurbanne (France). Lab. de Spectrometrie Ionique et Moleculaire
  2. Univ. Paris Sud, Orsay (France). Lab. de Photophysique Moleculaire
+ Show Author Affiliations
Spectroscopic data of the low-lying metastable singlet states of the nitrogen molecule are of great importance to the understanding of such phenomena as energy transfer processes in auroral excitation and chemical lasers. The first extensive analysis of the a[sup 1]II[sub g] [r arrow] a[prime][Sigma][sub u][sup [minus]] system of [sup 14]N[sub 2] is reported. The spectrum has been recorded by high-resolution Fourier transform spectrometry between 2,500 and 7,500 cm[sup [minus]1] using a supersonic jet and a classical microwave discharge. Accurate molecular parameters of the a[prime][sup 1][Sigma][sub u][sup [minus]], a[sup 1]II[sub g], and w[sup 1][Delta][sub u] states are determined by fitting simultaneously the whole set of wave-numbers of the two a [r arrow] a[prime] and w [r arrow] a systems. The RKR potential energy curve of the a[prime][sup 1][Epsilon][sub u][sup [minus]] state is then derived and Franck-Condon factors for the a [r arrow] a[prime] system are calculated. Predissociation is observed in the a[sup 1]II[sub g](v = 7) level.
OSTI ID:
7042087
Journal Information:
Journal of Molecular Spectroscopy; (United States), Journal Name: Journal of Molecular Spectroscopy; (United States) Vol. 164:2; ISSN JMOSA3; ISSN 0022-2852
Country of Publication:
United States
Language:
English

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426002 -- Engineering-- Lasers & Masers-- (1990-)
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664200 -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
AURORAE
CHEMICAL LASERS
DATA ANALYSIS
ELEMENTS
EMISSION SPECTROSCOPY
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
LASERS
METASTABLE STATES
NITROGEN
NONMETALS
SPECTRA
SPECTROSCOPY
ULTRAVIOLET SPECTRA