Mainz 2017 – scientific programme
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A: Fachverband Atomphysik
A 20: Poster Session I
A 20.26: Poster
Tuesday, March 7, 2017, 17:00–19:00, P OG1
Fragmentation Dynamics of Argon Dimers studied by XUV-IR Experiments at FLASH — •Georg Schmid1, Kirsten Schnorr1, Sven Augustin1, Hannes Lindenblatt1, Severin Meister1, Patrick Paluch1, Yifan Liu1, Thomas Ding1, Defu Luo1, Ann-Sophie Hilkert1, Lutz Fechner1, Kamal P. Singh2, Mathieu Gisselbrecht3, Harald Redlin4, Stefan Düsterer4, Rolf Treusch4, Claus-Dieter Schröter1, Thomas Pfeifer1, and Robert Moshammer1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2IISER, Mohali, India — 3Lund University, Sweden — 4DESY, Hamburg
XUV-IR pump-probe experiments on Argon dimers (Ar2) were performed at the free-electron laser in Hamburg (FLASH).
Different XUV (ℏ ω = 27 eV) multiphoton ionization pathways such as interatomic coulombic decay (ICD), radiative charge transfer (RCT), or frustrated multiple ionization could be identified by measuring the kinetic-energy release of the Coulomb-exploded dimer fragments using a reaction microscope. By applying an intense IR probe pulse (IIR ∼ 1014 W/cm2), we were able to follow the dynamics of those fragmentation pathways in real time. Amongst other things, we could deduce an average RCT lifetime for excited Ar2+(3p−3nl)−Ar states.