Abstract

Doppler-limited excitation spectra of the C2 anion were observed for the (2,4), (3,5), and (4,6) bands of the B2Σu+–X2Σg+ system by laser-induced fluorescence spectroscopy at room temperature. Doublet peaks which are expected for rotational lines of a 2Σ–2Σ transition were resolved in the spectra. The vibrational term values and molecular constants of the v=4–6 levels in the X2Σg+ state were experimentally determined.

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