Excitation and decay dynamics of 1s2s inner-shell double-vacancy states of neon atoms
Ding Xiao-Bin(丁晓彬)a), Dong Chen-Zhong(董晨钟)a)b)†, Fumihiro Koikec), Takako Katod), and Stephan Fritzschee)
a College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China; b Center of Theoretical Nuclear Physics, National laboratory of Heavy-Ion Accelerator of Lanzhou, Lanzhou 730000, China; c Physics Department, School of Medicine, Kitasato University, 1-15-1 Kitasato, 228-8555, Japan; d National Institute for Fusion Science, Nagoya, 464-01, Japan; eDepartment of Physics, University of Kassel, Heinrich-Plett-Stra$\beta$e 40, D-34132, Kassel, Germany
Abstract 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$^2$2p$^5$3s(3p), KLL Auger decay to 1s$^2$2s2p$^4$3s3p, and KLM Auger decay to 1s$^2$2p$^6$3s(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 Auger electron spectra are presented for further investigations, experimental and theoretical.
Received: 28 May 2007
Revised: 20 August 2007
Accepted manuscript online:
(Multiphoton ionization and excitation to highly excited states)
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 10434100, 10774122),
the Core-University Program between Japanese Society of Promotion of
Science and Chinese Academy of Sciences, the Foundation of Center of
Theoretical Nuclear Physics of National Laboratory of Heavy Ion
Accelerator of Lanzhou, and the Foundation of Northwest Normal
University (Grant No NWNU-KJCXGC-03-21).
Cite this article:
Ding Xiao-Bin(丁晓彬), Dong Chen-Zhong(董晨钟), Fumihiro Koike, Takako Kato, and Stephan Fritzsche Excitation and decay dynamics of 1s2s inner-shell double-vacancy states of neon atoms 2008 Chin. Phys. B 17 592
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