Study of the iodine absorption spectrum by means of Fourier spectroscopy in the region 12 600-14 000 cm-1

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Abstract
Twelve new absorption bands of the iodine molecular spectrum belonging to the (0, v"), (1, v") and (2, v") progressions, where 10 ≤ v" ≤ 14, have been analysed. The data obtained by Fourier spectroscopy measurements between 12 600 and 14 000 cm-1, permit both the extension of the precise determination of the molecular constants G(v"), B(v") and D(v") of the ground state X(1Σ+g) up to v" =14 and studies of the low-lying levels of the excited state B(3π+ou) ; in particular the separation between the two states X and B is found to be T0,0 = 15 724.586 ± 0.003 cm-1. Rotational distortion D, H and L constants for the B and X states have been computed from RKR potentials according to the method of Albritton et al. (J. Mol. Spectrosc. 46 (1973) 25). Good agreement between experimental and calculated D(v") and D(v') values was found. Franck-Condon Factors (FCF) were calculated and the computed relative intensities are consistent with the observed ones