New Rydberg-Rydberg transitions in N2. Identification of the d3 1Sigmag+ state.
Use of a special Penning-ionization source allowed Fourier-transform recording of two previously nonobserved IR emission bands spectra at 5480 and 7630 cm(-1) arising from neutral N(2). The first of these bands is the c(4) (') (1)Sigma(u) (+)-a(") (1)Sigma(g) (+) (0,0) transition, both states involved being previously known by direct vacuum (UV) absorption spectroscopy. The second band corresponds to a d(3) (1)Sigma(g) (+)-c(4) (') (1)Sigma(u) (+) (0,0) transition, in which the upper level belongs to an up to now unidentified Rydberg state. Both the upper and lower levels are perturbed by neighboring valence state levels.
Cossart
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Laboratoire de Photophysique Moleculaire du CNRS and Institut de Physico-Chimie Moléculaire, Bâtiment 213, Université de Paris-Sud, 91405 Orsay Cedex, France. daniel.cossart@ppm.u-psud.fr
Cossart-Magos
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