Stuttgart 2012 – scientific programme
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A: Fachverband Atomphysik
A 24: Poster: Interaction with VUV and X-ray light
A 24.5: Poster
Wednesday, March 14, 2012, 16:30–19:00, Poster.V
Fragmentation dynamics of molecular ions containing inner-shell ionized sulphur — •Arne Senftleben1, Kirsten Schnorr1, Moritz Kurka1, Georg Schmid1, Benjamin Erk2, Artem Rudenko2, Tatiana Marchenko3, Marc Simon3, Claus-Dieter Schröter1, Robert Moshammer1, and Joachim Ullrich1 — 1Max-Planck-Institut f. Kernphysik, Heidelberg — 2Max-Planck Advanced Study Group, Hamburg — 3LCPMR, Paris
The sulphur-containing molecules OCS and SF6 have been ionized by intense radiation of 200 eV photons from the free-electron laser in Hamburg (FLASH). The photon energy is sufficient to eject a sulphur 2p electron, leading to auto-ionization of one or more other electrons and consequently to dissociation of the molecule. Using a reaction microscope, we have measured photo-electrons in coincidence with the ionic fragments. This enables us to study interrelations between electron spectra and the fragmentation channel of the remaining ion. For OCS, molecular-frame photo-electron angular distributions can be shown, while in SF6 traces of non-linear processes will be discussed.