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Excitation and decay dynamics of 1s2s inner-shell double-vacancy states of neon atoms

Chinese Physics B 2008年第2期17卷 592-598页

作者：丁晓彬董晨钟 Fumihiro Koike Takako Kato Stephan Fritzsche College of Physics and Electronic Engineering Northwest Normal University Center of Theoretical Nuclear Physics National laboratory of Heavy-Ion Accelerator of Lanzhou Physics Department School of MedicineKitasato University1-15-1 Kitasato228-8555Japan National Institute for Fusion Science Department of Physics University of KasselHeinrich-Plett-Straβe 40D-34132KasselGermany

The photo-excitation and auger decay processes of inner-shell double vacancy states 1s2s2p^6（1,3^S）3s3p of neutral neon atoms have been studied theoretically. Multi-configuration Dirac-Fock （MCDF） calculations have been carried out, with electron correlation effects taken into consideration. The relaxation of core and excited orbitals and configuration interaction are found to be crucial to creating the double vacancy states by single photo-absorption. The predominant decay paths for the double vacancy states turn out to be of the LLM auger decay to 1s 2s^22p^53s（3p）, KLL auger decay to 1s^22s2p^43s3p, and KLM auger decay to 1s^22p^63s（3p）. They lead to further auger decay, creating the neon ions of multiple charge states. For both double and single vacancy states the spectator type of auger process is dominated in all the auger decay processes. Theoretical Anger electron spectra are presented for further investigations, experimental and theoretical.

关键词： correlation effects multi-configuration Dirac-Fock (MCDF) method auger decay

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Theoretical study on decay of the 4d core-excited states of Cs Ⅲ

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Chinese Physics B 2008年第6期17卷 2033-2039页

作者：丁晓彬董晨钟 Stephan Fritzschec College of Physics and Electronic Engineering Northwest Normal University Center of Theoretical Nuclear Physics National Laboratory of Heavy-Ion Accelerator of Lanzhou Department of Physics University of Kassel Heinrich-Plett-Strαβe 40 D-34132 Kassel Germany

In a recent XUV photoabsorption spectrum of Cs Ⅲ ions by Cummings and O＇Sullivan [2001 J. Phys. B 34 199], rather large linewidths were found for the 4d^95s^25p^6 - 4d^105s^25p^5 transition which are quite in disagreement with corresponding quasi-relativistic multiconfiguration Hartree Fock （MCHF） calculation. In the present work, a detailed multiconfiguration Dirac-Fock study has been carried out to explore this discrepancy. Owing to the detailed consideration of electron correlation effects, some ‘forbidden＇ auger decay channels, such as 4d^105s^25p^35d and 4d^105s^05p^6, would become ‘open＇. As a result, remarkable improvement of the linewidths has been obtained in our calculation. Furthermore, the theoretical auger spectrum of the 4d^ 95s^25p^6 core-excited states of Cs Ⅲ ions is Riven in the present work.

关键词： correlation effects linewidth auger decay

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