title: Gyroscopic destabilization of molecular rotation and quantum bifurcation observed in the structure of the ν23 fundamental of dimethylsulfoxyde.
abstract: Following the first successful high-resolution study of the "perpendicular" band of dimethylsulfoxyde at 324 cm(-1), associated with the ν23 bending vibration, we discovered a sequence of fourfold degenerate clusters of rotational levels at high angular momenta J>40. This unusual system of localized states corresponds to classical rotations about a pair of "tilted" axes, which become stationary at high J, after the principal axis of inertia A loses stability and bifurcates for J≈27.
authors.affiliation: Laboratoire de Physico-Chimie de l'Atmosphère, Département de physique, Université du Littoral-Côte d'Opale, 59140 Dunkerque, France. Arnaud.Cuisset@univ-littoral.fr
authors.forename: Arnaud
authors.initials: A
authors.lastname: Cuisset
authors.forename: Olivier
authors.initials: O
authors.lastname: Pirali
authors.forename: Dmitrií A
authors.initials: DA
authors.lastname: Sadovskií