Fourier transform emission spectroscopy of the second negative (A(2)Pi(u)-X-2 Pi(g)) system of the O-2(+) ion

C V V Prasad, D Lacombe, K Walker, W Kong, P Bernath, J Hepburn

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The second negative (A(2) Pi(u)-X-2 Pi(g)) system of the O-2(+) ion was produced in a tungsten hollow cathode discharge tube using oxygen in neon. This spectrum was recorded with the McMath-Pierce Fourier transform spectrometer of the National Solar Observatory. A total of ten bands with upsilon' = 0 and 1 and upsilon '' = 6 to 12 in the range 15 945-30 218 cm(-1) were observed and rotationally analysed. The line positions of all these bands, along with those of a few additional bands available in the literature, were combined in a global least-squares fit. Many molecular parameters for the various vibrational levels and the equilibrium molecular constants for the X and A states were estimated. RKR potential energy curves were constructed and Franck-Condon factors were calculated for the vibrational bands of the second negative (A-X) system. Some additional information obtained from threshold photoelectron spectroscopy was used to extend the X-2 Pi(g) potential curve up to upsilon = 24.

Original languageEnglish
Pages (from-to)1059-1074
Number of pages16
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number6
Publication statusPublished - 20 Aug 1997



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