Düsseldorf 2007 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 25: Poster II - Photoionization
A 25.2: Poster
Donnerstag, 22. März 2007, 16:30–18:30, Poster B
Observation of the interaction between Rydberg series of doubly excited states in Kr and Xe after excitation with narrow bandwidth synchrotron radiation by photon induced fluorescence spectroscopy (PIFS) — •Stephan Klumpp1, Witowslaw Kielich1, Lutz Werner1, Arno Ehresmann1, Viktor Sukhorukov2, Ivan Petrov2, and Philip Demekhin2 — 1Institut für Physik und CINSaT , Universität Kassel — 2Rostov State University of Transport Communications
Xe gas was excited with synchrotron radiation of narrow bandwidth produced by the undulator U125/2 of BESSY II, Berlin, and dispersed by a 10m NIM. The emitted and dispersed Xe fluorescence lines were observed simultaneously within a fluorescence wavelength range between 90nm and 100nm using the method of PIFS. In the exciting-photon energy range between 25.25eV and 25.50eV Codling and Madden 1972 and Wills et. al. 1990 published a number of resonances but weren’t able to assign quantum numbers. With the narrow bandwidth excitation radiation it was possible to resolve a more detailed spectrum of the named excitation-photon energy range. According to Codling and Madden the visible resonance features measured in this exciting-photon energy region are due to correlative doubly excited states in XeI. Calculations for doubly excited states in KrI will be presented taking into account core relaxation and interaction between many resonances and many continua explaining Rydberg series 5snp 4P1/2 and 5snp 2P3/2 of doubly excited states in KrI in the fluorescence emission spectra of KrII.