title: Circularly polarized x rays: another probe of ultrafast molecular decay dynamics.
abstract: Dissociative nuclear motion in core-excited molecular states leads to a splitting of the fragment Auger lines: the Auger-Doppler effect. We present here for the first time experimental evidence for an Auger-Doppler effect following F1s → a(1g)* inner-shell excitation by circularly polarized x rays in SF(6). In spite of a uniform distribution of the dissociating S-F bonds near the polarization plane of the light, the intersection between the subpopulation of molecules selected by the core excitation with the cone of dissociation induces a strong anisotropy in the distribution of the S-F bonds that contributes to the scattering profile measured in the polarization plane.
authors.affiliation: Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France.
authors.forename: Oksana
authors.initials: O
authors.lastname: Travnikova
authors.forename: Ji-Cai
authors.initials: JC
authors.lastname: Liu
authors.forename: Andreas
authors.initials: A
authors.lastname: Lindblad
authors.forename: Christophe
authors.initials: C
authors.lastname: Nicolas
authors.forename: Johan
authors.initials: J
authors.lastname: Söderström
authors.forename: Victor
authors.initials: V
authors.lastname: Kimberg
authors.forename: Faris
authors.initials: F
authors.lastname: Gel'mukhanov
authors.forename: Catalin
authors.initials: C
authors.lastname: Miron