The Absorption Spectrum of Isotopic Diatomic Antimony ( 123Sb-123Sb). Analysis of the D ← X System in the 2860—2920 Å Region

Abstract
A rotational analysis of several bands of the D←X system of 123Sb−123Sb is carried out. It is shown that the hitherto assumed vibrational classification of the D←X system is certainly incorrect, as well as a previously given value for the rotational constant of the X state. B(X1g +, ν=0) is found equal to 0.044263 cm-1. The perturbations appearing in the various vibrational levels are interpreted in terms of interactions with a new electronic state, labelled L.
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