Deep inner-shell multiphoton ionization by intense x-ray free-electron laser pulses

Abstract

We have investigated multiphoton multiple ionization dynamics of argon and xenon atoms using a new x-ray free electron laser (XFEL) facility, SPring-8 Angstrom Compact free electron LAser (SACLA) in Japan, and identified that highly charged Xe ions with the charge state up to +26 are produced predominantly via four-photon absorption as well as highly charged Ar ions with the charge state up to +10 are produced via two-photon absorption at a photon energy of 5.5 keV. The absolute fluence of the XFEL pulse, needed for comparison between theory and experiment, has been determined using two-photon processes in the argon atom with the help of benchmark ab initio calculations. Our experimental results, in combination with a newly developed theoretical model for heavy atoms, demonstrate the occurrence of multiphoton absorption involving deep inner shells.

5 pages, 5 figures

References in corpus (4)

• Double core hole production in N2: Beating the Auger clock
• Experimental Verification of the Chemical Sensitivity of Two-Site Double Core-Hole States Formed by an X-ray FEL
• Monte Carlo calculation of ion, electron, and photon spectra of xenon atoms in x-ray free-electron laser pulses
• Route to Direct Multiphoton Multiple Ionization

Cited by in corpus (26)

• Multiple ionization of argon via xuv-photon absorption induced by 20-gigawatt high-harmonic pulses
• Efficient electronic structure calculation for molecular ionization dynamics at high x-ray intensity
• Calculation of photoelectron spectra within the time-dependent configuration interaction singles scheme
• Atomic, molecular and optical physics applications of longitudinally coherent and narrow bandwidth Free-Electron Lasers
• Determination of multiwavelength anomalous diffraction coefficients at high x-ray intensity
• Interplay between relativistic energy corrections and resonant excitations in x-ray multiphoton ionization dynamics of Xe atoms
• Quantum coherence in the dynamical excitation, ionization, and decaying of neon gas induced by X-ray laser
• XCALIB: a focal spot calibrator for intense X-ray free-electron laser pulses based on the charge state distributions of light atoms
• Resonance-enhanced multiphoton ionization in the x-ray regime
• Theoretical evidence for the sensitivity of charge-rearrangement-enhanced x-ray ionization to molecular size
• Resonant propagation of x-rays from the linear to the nonlinear regime
• Controlling core-hole lifetime through an x-ray planar cavity
• A molecular-dynamics approach for studying the non-equilibrium behavior of x-ray-heated solid-density matter
• Auger spectra following inner-shell ionization of Argon by a Free-Electron Laser
• Multiple Ionization under Strong XUV to X-ray Radiation
• Theoretical investigation of orbital alignment of x-ray-ionized atoms in exotic electronic configurations
• Nonlinear effects in photoionization over a broad photon-energy range within the TDCIS scheme
• Simple model for sequential multiphoton ionization by ultra-intense x-rays
• State-resolved ionization dynamics of neon atom induced by x-ray free-electron-laser pulses
• Breakdown of the electric dipole approximation at Cooper minima in direct two-photon ionisation
• Evolution of the ionic polarization in multiple sequential ionization: general equations and an illustrative example
• Multiple Ionization of Neon under soft x-rays: Theory vs Experiment
• Compton spectra of atoms at high x-ray intensity
• Ultraintense, ultrashort pulse x-ray scattering in small molecules
• Enhanced One-Color-Two-Photon Resonant Ionization in Highly Charged Ions by Fine-Structure Effects
• Coulomb explosion of CD3I induced by single photon deep inner-shell ionisation