Resonant Auger decay of the core-excited C${}^{\ast }$O molecule in intense X-ray laser fields

Abstract

The dynamics of the resonant Auger (RA) process of the core-excited C${}^{\ast }$O(1s${}^{-1}{\pi }^{\ast },v_r=0$) molecule in an intense X-ray laser field is studied theoretically. The theoretical approach includes the analogue of the conical intersections of the complex potential energy surfaces of the ground and `dressed' resonant states due to intense X-ray pulses, taking into account the decay of the resonance and the direct photoionization of the ground state, both populating the same final ionic states coherently, as well as the direct photoionization of the resonance state itself. The light-induced non-adiabatic effect of the analogue of the conical intersections of the resulting complex potential energy surfaces gives rise to strong coupling between the electronic, vibrational and rotational degrees of freedom of the diatomic CO molecule. The interplay of the direct photoionization of the ground state and of the decay of the resonance increases dramatically with the field intensity. The coherent population of a final ionic state via both the direct photoionization and the resonant Auger decay channels induces strong interference effects with distinct patterns in the RA electron spectra. The individual impact of these physical processes on the total electron yield and on the CO${}^{+}(A^2\Pi )$ electron spectrum are demonstrated.

13 figs, 1 tabel

References in corpus (2)

• Strong impact of light induced conical intersections on the spectrum of diatomic molecules
• Strong interference effects in the resonant Auger decay of atoms induced by intense X-Ray fields

Cited by in corpus (12)

• Dynamic interference of photoelectrons produced by high-frequency laser pulses
• Control of 1,3-Cyclohexadiene Photoisomerization Using Light-Induced Conical Intersections
• Observation of Quantum Interferences via Light Induced Conical Intersections in Diatomic Molecules
• Coherent intense resonant laser pulses lead to interference in the time domain observable in the spectrum of the emitted particles
• Photoemission spectroscopy with high-intensity short-wavelength lasers
• Exploring Interatomic Coulombic Decay by Free Electron Lasers
• Overcoming blockade in producing doubly-excited dimers by a single intense pulse and their decay
• Impact of intense laser pulses on the autoionization dynamics of the 2s2p doubly-excited state of He
• Photoionization of hydrogen atom by coherent intense high-frequency short laser pulses: Direct propagation of electron wave packets on large spatial grids
• Quantum-beat Auger spectroscopy
• A time-dependent Schrödinger equation for molecular core-hole dynamics
• Driving Rabi oscillations at the giant dipole resonance in xenon