Osnabrück 2002 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

MO: Molekülphysik

MO 15: Photoionisation II (gemeinsam mit FV Atomphysik)

MO 15.6: Vortrag

Donnerstag, 7. März 2002, 15:15–15:30, HS 15/E10

The complete description of the 4σ−1 inner valence photoionization of NO derived from photoelectron and photoion angular distributions — •Oliver Gessner1, Yasumasa Hikosaka2, Björn Zimmermann1, Andreas Hempelmann1, John Eland2, Paul-Marie Guyon3, and Uwe Becker11Fritz-Haber-Institut der MPG, Faradayweg 4-6,14195 Berlin, Germany — 2Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ, UK — 3Laboratoire des Collisions Atomiques et Moléculaires, Université Paris Sud, 91405 Orsay, France

We measured molecular frame angular distributions of NO 4σ−1 photoelectrons and photoions after excitation with linearly and circularly polarized light at hν=40.8 eV. The angular correlations of the emitted electrons and ions were analyzed using a new fitting procedure which takes into account all experimental angular resolution effects. For the first time a complete description of the valence photoionization of a heteronuclear molecule was derived from photoelectron and photoion angular distributions. The combination of measurements with linearly and circularly polarized light leads to a unique set of dipole matrix elements and phase differences describing the 4σ−1 inner valence photoioinization of NO. All σ−σ and σ−π dipole transition parameters were simultaneously derived without any additional input from ab initio model calculations. The reliability of the method is estimated using standard fit analysis functions supplying future molecular structure calculations such as RPA and LDA with quantitative benchmarks.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2002 > Osnabrück