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 123 Sb -123 Sb 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(X 1 2g + , £ = 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.