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A: Atomphysik

A 15: Poster 2

A 15.10: Poster

Thursday, March 25, 2004, 14:00–16:00, Schellingstr. 3

Assignment of Rydberg series of doubly excited states in Kr near the 4s ionization threshold — •Stephan Klumpp¹, Lutz Werner¹, Arno Ehresmann¹, Hans Schmoranzer¹, Sven Kammer², Sascha Mickat², Karl-Heinz Schartner², Ivan D. Petrov³, Boris M. Lagutin³, Philip V. Demekhin³, and Victor L. Sukhorukov³ — ¹Fachbereich Physik, TU Kaiserslautern Erwin-Schrödinger-Str. D-67663 Kaiserslautern, Germany — ²I. Physikalisches Institut, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany — ³Rostov State University of Transport Communicatioons, 344038 Rostov-on-Don, Russia

Rydberg series of doubly excited states near the Kr 4s ionization threshold were examined using photon-induced fluorescence spectroscopy (PIFS). Synchrotron radiation of very narrow bandwidth (Δ E = 1.7 eV) from the electron storage ring BESSY II, Berlin,at the undulator source U125/1 and monochromatized by a PGM monochromator was used as source of the exciting photons. With the achieved narrow bandwidth it was possible to assign quantum numbers to the Rydberg electrons of the examined doubly excited states for the first time.