title: Wave packet movements near the conical intersection between two excited potential surfaces may create observable molecular oscillations.
abstract: A femtosecond pump-probe experiment is performed on tetrakis(dimethylamino)ethylene. The evolution resulting from the pi-pi(*) excitation of the CC double bond corresponds to movement along a single adiabatic potential surface with deformation along several coordinates and passage near a conical intersection. Surprisingly, this movement excites the umbrella mode of the amino groups, resulting in a measurable oscillation regime.
authors.affiliation: Laboratoire Francis Perrin, CEA/DRECAM/Service des Photons, Atomes et Molécules, C.E.N. Saclay, F-91191 Gif-sur-Yvette Cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: Sorgues
authors.forename: J M
authors.initials: JM
authors.lastname: Mestdagh
authors.forename: J P
authors.initials: JP
authors.lastname: Visticot
authors.forename: B
authors.initials: B
authors.lastname: Soep