Münster 1999 – scientific programme
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O: Oberflächenphysik
O 40: Elektronische Struktur (Experiment und Theorie) (IV)
O 40.7: Talk
Friday, March 26, 1999, 12:45–13:00, S1
Role of final-state configuration interaction in resonant photoemission — •Serguei Molodtsov1, Yuri Kucherenko2, Manuel Richter3, Juanjo Hinarejos1, Steffen Danzenbächer1, and Clemens Laubschat1 — 1TU Dresden, FR Physik, Institut für Oberflächenphysik und Mikrostrukturphysik, 01062 Dresden — 2Institute of Metal Physics, National Acad. of Science of Ukraine, 252142 Kiev, Ukraine — 3TU Dresden, FR Physik, Institut für Theoretische Physik, 01062 Dresden
We report on configuration interaction in resonant photoemission from La metal. In contrast to La3d94fn photoemission final states, where the 4f1 component appears at the low binding-energy side of the 4f0 emission, a reversed situation is encountered for the La5p states due to a weaker core-hole interaction with the 4f-electron. At the 4d → 4f excitation threshold, the La5p54f0 component reveals a giant resonant enhancement for transitions into 1P1 and only weak intensity variations for excitations into 3P1 and 3D1 intermediate states. The La5p54f1 component reveals an opposite behavior. This is explained by different contributions of spectator and participator processes to the decay of the intermediate states.