NEW ANALYSIS OF THE C2 BALLIK-RAMSAY SYSTEM FROM FLAME EMISSION-SPECTRA

The C2 b3Σg- → a3Πu Ballik-Ramsay system has been studied through emission flame spectra recorded with a Fourier transform interferometer. The 14 bands 0-0, 1-0, 1-1, 2-0, 2-1, 3-0, 3-1, 3-2, 4-1, 4-2, 5-2, 5-3, 6-3, and 7-4 were identified in the 4850- 9900-cm-1 spectral range. They have been reduced to molecular constants using an iterative, nonlinear, least-squares method. Rotational perturbations, observed in the b3Σg-v = 0, 1, 2, 5, and 6 levels, have been reduced. Dunham coefficients are obtained for both the b3Σg- and a3Πu states. © 1979.