Probing O+2 potential curves with an XUV_IR pump_probe experiment

29th International Conference on Photonic, Electronic, and Atomic Collisions

Cörlin, Philipp^1 ; Fischer, Andreas^1 ; Schönwald, Michael^1 ; Sperl, Alexander^1 ; Mizuno, Tomoya^1 ; Thumm, Uwe^2 ; Pfeifer, Thomas^1 ; Moshammer, Robert^1

Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg

69117, Germany^1

Kansas State University, Manhattana

KS

66506, United States^2

关键词: Born-Oppenheimer potentials;    Coupled channels;    Experimental spectra;    Kinetic energy release;    Potential curves;    Pump-probe delays;    Pump-probe experiments;    Vibrational wave packets;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/11/112060/pdf
DOI  :  10.1088/1742-6596/635/11/112060

来源: IOP

【 摘 要 】

Upon ionization of ground state O2molecules in a short XUV pulse, we observe a time-dependent vibrational wave packet in the potential of the binding O+2(a4Πu) state. Our pump-probe delay dependent kinetic-energy-release (KER) spectra are in qualitative agreement with the results of coupled-channel simulations that are based on calculated Born-Oppenheimer potential-energy curves (PECs). Using a Morse potential adjusted to the experimental data most features of the experimental spectra are reproduced quantitatively.