%0 DATA
%A S, Mondal
%A M Yao
%A Y Mizoguchi
%A S Yase
%A K Nagaya
%A A Yamada
%A H Fukuzawa
%A K Motomura
%A R Ma
%A A Rouzée
%D 2013
%T Measured (solid lines) and calculated (dashed lines) photoelectron angular distributions for the second-step photoelectron in the two-photon sequential double ionization of xenon at a photon energy of 24.3 eV
%U https://figshare.com/articles/_Measured_solid_lines_and_calculated_dashed_lines_photoelectron_angular_distributions_for_the_second/1012447
%R 10.6084/m9.figshare.1012447.v1
%2 https://ndownloader.figshare.com/files/1480269
%K compact
%K approach
%K dirac
%K photoelectron
%K ionization
%K velocity map imaging
%K panel
%K laser
%K figure
%K Photon energy
%K ev
%K sequential
%K pulse
%K calculation
%K ultrashort
%K source
%K right
%K photoelectrons
%K 23.0
%K sase
%K peak 4. Abstract Xenon atoms
%K absorption
%K xenon
%X **Figure 5.** Measured (solid lines) and calculated (dashed lines) photoelectron angular distributions for the second-step photoelectron in the two-photon sequential double ionization of xenon at a photon energy of 24.3 eV. The left panel is for peak 3 and the right panel for peak 4.

**Abstract**

Xenon atoms are double-ionized by sequential two-photon absorption by ultrashort extreme ultraviolet free-electron laser pulses with a photon energy of 23.0 and 24.3 eV, produced by the SPring-8 Compact SASE Source test accelerator. The angular distributions of photoelectrons generated by two-photon double ionization are obtained using velocity map imaging. The results are reproduced reasonably well by the present theoretical calculations within the multi-configurational Dirac–Fock approach.