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.
Cite
@article{arxiv.1210.0673,
title = {Deep inner-shell multiphoton ionization by intense x-ray free-electron laser pulses},
author = {H. Fukuzawa and S. -K. Son and K. Motomura and S. Mondal and K. Nagaya and S. Wada and X. -J. Liu and R. Feifel and T. Tachibana and Y. Ito and M. Kimura and T. Sakai and K. Matsunami and H. Hayashita and J. Kajikawa and P. Johnsson and M. Siano and E. Kukk and B. Rudek and B. Erk and L. Foucar and E. Robert and C. Miron and K. Tono and Y. Inubushi and T. Hatsui and M. Yabashi and M. Yao and R. Santra and K. Ueda},
journal= {arXiv preprint arXiv:1210.0673},
year = {2015}
}
Comments
5 pages, 5 figures