| DATE: |
2005-02-28 13:30 - 14:30 |
| PLACE: |
PF Kenkyu Building, Conference room on the 2F |
| TITLE: |
Seminar Vibrationally resolved photoelectron angular distributions for K-shells of CO and N2 molecules |
| SPEAKER: |
Prof. Nikolai Cherepkov (State University of Aerospace Instrumentation, Tohoku University) |
| LANGUAGE: |
English |
| URL: |
http://pfwww.kek.jp/pf-seminar/ |
| ABSTRACT: |
Partial photoionization cross sections and the angular asymmetry parameter beta for the C and O K-shells of CO molecule have been calculated in the relaxed core Hartree-Fock approximation with a fractional charge of the ion, which was fitted from the condition to get an agreement with the experimental position of the sigma* shape resonance. Vibrational motion was taken into account by averaging the dipole amplitudes over the inter-nuclear distances R with the vibrational wave functions of the initial and final states. A good agreement was found with the results of recent experiments. The similar calculations for the gerade and un-gerade K-shells of N2 molecule in the random phase approximation revealed a great influence of many-electron correlations on the symmetry and vibrationally resolved angular asymmetry parameter beta for the un-gerade K-shell, in a good agreement with the most recent experimental data from the Dr. Ueda's group. The existence of the correlational maximum in the partial photo-ionization cross section for the un-gerade K-shell predicted earlier by theory was also confirmed by this group. |
