Osnabrück 2002 – wissenschaftliches Programm
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MO: Molekülphysik
MO 15: Photoionisation II (gemeinsam mit FV Atomphysik)
MO 15.4: Vortrag
Donnerstag, 7. März 2002, 14:45–15:00, HS 15/E10
Circular Dichroism in K-shell Ionization from Fixed-in-Space CO and N2 Molecules — •T. Jahnke1, Th. Weber1, A. L. Landers2, A. Knapp1, S. Schössler1, J. Nickles1, S. Kammer1, O. Jagutzki1, L. Schmidt1, A. Czasch1, T. Osipov3, E. Arenholz4, A. T. Young4, R. Díez Muiño4,5, D. Rolles4, F. J. García de Abajo4, C. S. Fadley4,6, M. A. Van Hove4,6, S. K. Semenov7, N. A. Cherepkov7, J. Rösch4, M. H. Prior4, H. Schmidt-Böcking1, C. L. Cocke3, and R. Dörner1 — 1Institut für Kernphysik, University Frankfurt, August-Euler Str 6, D-60486 Frankfurt Germany — 2Dept. of Physics, Western Michigan Univ., Kalamazoo, MI 49008 — 3Dept of Physics, Kansas State Univ, Cardwell Hall, Manhattan KS 66506 — 4Lawrence Berkeley National Lab., Berkeley CA 94720 — 5Donostia International Physics Center, P. Manuel de Lardizabal 4, 20018 San Sebastian, Spain — 6Department of Physics, University of California, Davis, CA 95616 — 7State University of Aerospace Instrumentation, 190000 St.
We have measured the angular distributions of 1s-photoelectrons excited by circularly and linearly polarized light from fixed-in-space CO and N2 molecules, in the vicinity of their shape resonances. A strong circular dichroism, i.e. a strong dependence on the sense of rotation of the polarization vector of the photons, is found for both molecules. State-of-the-art one-electron multiple scattering and partially-correlated random phase approximation calculations are in good agreement with many, but not all, aspects of the experimental data.