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HIGH RESOLUTION INFRARED FOURIER TRANSFORM EMISSION SPECTRUM OF THE $N_{2}^{+}$ MEINEL SYSTEM $A^{2}\Pi_{a}$-$X^{2}\sum_{g}$

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/12504

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Title: HIGH RESOLUTION INFRARED FOURIER TRANSFORM EMISSION SPECTRUM OF THE $N_{2}^{+}$ MEINEL SYSTEM $A^{2}\Pi_{a}$-$X^{2}\sum_{g}$
Creators: Ferguson, D. W.; Guelachvili, G.; Martin, P. A.; Narahari Rao, K.
Issue Date: 1991
Abstract: Although the $B^{2}\sum_\mu^{+}-X^{2}\sum_{g}^{+}$ system of $N_{2}^{+}$ is well known, there have been only a few previous studies of the Meinel system (A-X).$^{1-4}$ Infrared emission spectra of the $N_{2}^{+}$ molecular ion have been recorded from 4000--11000$cm^{-1}$ at 0.013$cm^{-1}$ resolution using the Fourier transform interferometer of the Laboratoire d’Infrarouge. Orsey, France. The best signal-to-noise ratios were obtained using a hollow cathode source with flowing nitrogen although a positive column discharge was also used. Nine bands of the $N_{2}^{+}$ Meinel system were observed (0-0, 0-1, 0-2, 1-0, 1-1, 1-2, 1-3, 2-3), several for the first time and the others at higher resolution than recorded previously. Most of these bands have been subjected to a detailed spectral analysis to provide new, more precise molecular parameters for the $A^{2}\Pi_{4}$ and $X^{2}\sum_{5}^{+}$ states, especially the spin-rotation constant of the ground state which is difficult to determine from the B-X system. Equilibrium parameters are also determined in this analysis.
URI: http://hdl.handle.net/1811/12504
Other Identifiers: 1991-TB-6
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