Mainz 2017 – scientific programme
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MO: Fachverband Molekülphysik
MO 9: Posters 1: Dichroism, VUV and Xray, Clusters, and Cold Molecules
MO 9.7: Poster
Tuesday, March 7, 2017, 17:00–19:00, P OG1
Electron-nuclear Coupling through Autoionizing States after Strong-field Excitation of H2 Molecules — •Yonghao Mi, Nicolas Camus, Lutz Fechner, Martin Laux, Robert Moshammer, and Thomas Pfeifer — Max-Planck-Intitute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg
Channel-selective electron emission from strong-field photo-ionization of H2 molecules is experimentally investigated by using ultrashort laser pulses and a Reaction Microscope. The electron momenta and energy spectra in coincidence with bound and dissociative ionization channels are compared. Surprisingly, we observed an enhancement of the photoelectron yield in the low-energy region for the bound ionization channel. By further investigation of asymmetrical electron emission using two-color laser pulses, this enhancement is understood as the population of the autoionizing states of H2 molecules in which vibrational energy is transferred to electronic energy.