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A: Fachverband Atomphysik
A 32: Molecules in Intense Laser Fields (joint session MO/A)
A 32.5: Vortrag
Mittwoch, 7. März 2018, 15:15–15:30, PA 2.150
Electron-Nuclear Coupling through Autoionizing Rydberg States after Strong-field Excitation of Molecules — •Yonghao Mi, Nicolas Camus, Lutz Fechner, Martin Laux, Robert Moshammer, and Thomas Pfeifer — Max-Planck-Institute for Nuclear Physics
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 (H2+) 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 neutral H2 molecules in which vibrational energy is transferred to electronic energy. This general mechanism, provides access to the excited-state population of molecular ions produced in a strong-field interaction.