Ionization of N{sub 2}, O{sub 2}, and linear carbon clusters in a strong laser pulse

Journal Article · Sun Feb 01 04:00:00 EST 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.023410· OSTI ID:20640755

Jaron-Becker, A ^[1]; Becker, A ^[2]; Faisal, F H.M. ^[3]

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1. Institute for Theoretical Physics, Warsaw University, Hoza 69, 00-691 Warsaw (Poland)
2. Max-Planck-Institut fuer Physik komplexer Systeme, Noethnitzer Strasse 38, D-01187 Dresden (Germany)
3. Fakultaet fuer Physik, Universitaet Bielefeld, Postfach 100131, D-33501 Bielefeld (Germany)

Multiphoton ionization of linear molecules is studied using the strong-field S-matrix approach. Numerical calculations for the angular distribution and the energy spectrum of the photoelectron as well as the total ionization rates and yields in an intense linearly polarized laser pulse are performed. Results are obtained for molecules aligned along the polarization axis and for ensembles of molecules having a random orientation of the molecular axis with respect to the polarization direction. Signatures of the molecular geometry and the orbital symmetry are identified and discussed with reference to molecular imaging and alignment. It is found that these signatures are clearly marked for the diatomic molecules C{sub 2}, N{sub 2}, and O{sub 2}, but are much weaker for the group of linear carbon clusters due to the polyatomic character as well as to the competing contributions from different valence shells of these molecules. Finally, predictions of the present theory for the dependence of the total ionization rates and yields on the orientation of the molecule are compared with other theoretical models and recent experimental data.

• OSTI ID: 20640755
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 69; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ATOMIC CLUSTERS
CARBON
ENERGY SPECTRA
GEOMETRY
LASER RADIATION
MOLECULAR STRUCTURE
MOLECULES
MULTI-PHOTON PROCESSES
NITROGEN
ORIENTATION
OXYGEN
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
PHOTON-MOLECULE COLLISIONS
POLARIZATION
PULSES
S MATRIX
VALENCE
YIELDS