Freiburg 2024 – scientific programme
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MO: Fachverband Molekülphysik
MO 22: Poster: Molecules in Strong Fields
MO 22.1: Poster
Thursday, March 14, 2024, 17:00–19:00, Tent C
Dissociation Dynamics of Diiodomethane following XUV-induced inner-shell ionisation — •F. Trost1, H. Lindenblatt1, S. Meister1, K. Schnorr1, S. Augustin1, G. Schmid1, Y. Liu1, P. Schoch1, F. Hosseini2, M. Zmerli2, M. Braune5, M. Kuhlmann5, S. Díaz-Tendero4, F. Martín4, R. Guillemin2, M.-N. Piancastelli3, M. Simon2, T. Pfeifer1, C. D. Schröter1, and R. Moshammer1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Sorbonne Université, Paris — 3Uppsala Universitet — 4Universidad Autónoma de Madrid — 5DESY, Hamburg
Knowledge of de-excitation, charge redistribution and fragmentation of molecules upon XUV irradiation is essential for our understanding of light-matter interaction. Here, the sequential three-body fragmentation of diiodomethane (CH2I2) following 4d inner-shell ionisation of one iodine atom is presented. The data was obtained by a time-resolved XUV-XUV pump-probe measurement using the reaction microscope endstation at the free-electron laser FLASH2 at DESY. In the two-step dissociation process of the CH2I2 molecule a rotating intermediary state is identified through time-resolved 3D momentum correlation of the fragments. These results are supported by classical as well as quantum-mechanical simulations.
Keywords: CH2I2; momentum coincidence spectroscopy; time-resolved XUV pump-probe; CT