Rotational analysis of the (57,0) band of the D1u ← X0g+ triplet-singlet transition in Hg2 produced in a free-jet expansion beam

Analysis of the rotational structure of the (57,0) vibrational band of the D1(u) <- X0(g)(+) transition in Hg-2 (natural abundance) is presented. From the analysis, the B-upsilon'=57, B-upsilon ''=0, B-c' and B-c '' rotational constants of the Hg-398(2), Hg-400(2), Hg-402(2), Hg-404(2) and Hg-406(2), as well as the R-c' = 2.715 angstrom and R-c '' = 3.605 angstrom bond lengths for the excited and ground electronic energy states involved in the transition are determined. (c) 2008 Elsevier B.V. All rights reserved.