Münster 1999 – wissenschaftliches Programm

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O: Oberflächenphysik

O 40: Elektronische Struktur (Experiment und Theorie) (IV)

O 40.7: Vortrag

Freitag, 26. März 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.