Published July 2010 | Version v1
Journal article Metadata-only

Differential cross sections for non-sequential double ionization of He by 52 eV photons from the Free Electron Laser in Hamburg, FLASH

Creators

  • 1. Max-Planck-Institut fuer Kernphysik, 69117 Heidelberg (Germany)
  • 2. Institute for Theoretical Physics, Vienna University of Technology, 1040 Vienna (Austria)
  • 3. Los Alamos National Laboratory, Theoretical Division, Los Alamos, NM 87545 (United States)
  • 4. Lawrence Berkeley National Laboratory, Chemical Sciences and Ultrafast X-ray Science Laboratory, Berkeley, CA 94720 (United States)
  • 5. Missouri University of Science and Technology, Physics Departmentand LAMOR, Rolla, MO 65409 (United States)
  • 6. Max-Planck-Institut fuer Quantenoptik, 85748 Garching (Germany)
  • 7. DESY, 22607 Hamburg (Germany)
  • 8. Office of Cyberinfrastructure/Physics Division, National Science Foundation, Arlington, VA 22230 (United States)

Description

Two-photon double ionization of He is studied at the Free Electron Laser in Hamburg (FLASH) by inspecting He2+ momentum (P-vector(He2+)) distributions at 52 eV photon energy. We demonstrate that recoil ion momentum distributions can be used to infer information about highly correlated electron dynamics and find the first experimental evidence for 'virtual sequential ionization'. The experimental data are compared with the results of two calculations, both solving the time-dependent Schroedinger equation. We find good overall agreement between experiment and theory, with significant differences for cuts along the polarization direction that cannot be explained by the experimental resolution alone.

Availability note (English)

Available from http://dx.doi.org/10.1088/1367-2630/12/7/073035

Additional details

Identifiers

DOI
10.1088/1367-2630/12/7/073035;

Publishing Information

Journal Title
New Journal of Physics
Journal Volume
12
Journal Issue
7
Journal Page Range
[17 p.]
ISSN
1367-2630

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
42066594
Subject category
S74: ATOMIC AND MOLECULAR PHYSICS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
DIFFERENTIAL CROSS SECTIONS; DISTRIBUTION; ELECTRON CORRELATION; EV RANGE; EXPERIMENTAL DATA; FREE ELECTRON LASERS; HELIUM 2; HELIUM IONS; IONIZATION; PHOTONS; POLARIZATION; RECOILS; RESOLUTION; SCHROEDINGER EQUATION; TIME DEPENDENCE
Descriptors DEC
BOSONS; CHARGED PARTICLES; CORRELATIONS; CROSS SECTIONS; DATA; DIFFERENTIAL EQUATIONS; ELEMENTARY PARTICLES; ENERGY RANGE; EQUATIONS; EVEN-EVEN NUCLEI; HELIUM ISOTOPES; INFORMATION; IONS; ISOTOPES; LASERS; LIGHT NUCLEI; MASSLESS PARTICLES; NUCLEI; NUMERICAL DATA; PARTIAL DIFFERENTIAL EQUATIONS; WAVE EQUATIONS