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A: Fachverband Atomphysik

A 34: Interaction with VUV and X-ray light

A 34.6: Poster

Donnerstag, 14. März 2019, 16:15–18:15, S Fobau Physik

Relaxation dynamics of CH3I and CH2I2 following FEL-induced inner-shell ionisation — •Florian Trost1, Kirsten Schnorr1, Sven Augustin1, Severin Meister1, Hannes Lindenblatt1, Yifan Liu1, Marc Simon2, Renaud Guillemin2, Maria Novella Piancastelli3, Farzad Hosseini2, Mustafa Zmerli2, Markus Braune4, Marion Kuhlmann4, Thomas Pfeifer1, and Robert Moshammer11Max-Planck-Institut für Kernphysik, Heidelberg — 2Université Pierre-et-Marie-Curie, Paris — 3Uppsala Universitet, Uppsala — 4DESY, Hamburg

Using the reaction microscope endstation at the free-electron laser (FEL) in Hamburg (FLASH), the relaxation dynamics of methyl iodide (CH3I) and diiodomethane (CH2I2) after inner-shell ionisation have been studied. FLASH2's XUV (12.7 nm) photons were used to ionise the iodine 4d inner shell electrons twice sequentially using an XUV pump - XUV probe technique with variable delay. The first XUV photon induces the dissociation of the doubly charged molecule. The absorption of the second photon, leading to quadruply charged ions, allows to probe the dissociation. The momentum-resolved data of the coincident fragments of the dissociated molecules will be presented.

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DPG-Physik > DPG-Verhandlungen > 2019 > Rostock