Theoretical study on the dynamical correlation in Ar focusing on 3s excitation with outer-shell ionization due to electron impacts

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Tsutomu Watanabe,^1,2 Andrew T. Domondon,^3,4 and Xiao-Min Tong^5,6
¹Institute for Laser Science, University of Electro-Communications, Chofugaoka, Chofu, Tokyo 182-8585, Japan
²Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo 192-0364, Japan
³International Christian University, Ohsawa, Mitaka-shi, Tokyo 181-8585, Japan
⁴Committee on Conceptual and Historical Studies of Science, University of Chicago, Room 205, 1126 East 59th Street, Chicago, Illinois 60637, USA
⁵Institute of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
⁶Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan

Received 6 July 2009; published 16 October 2009

Weinvestigate the energy-loss spectra of high-energy electrons incident on Aratoms using linear density response theory with a self-interaction correction.The energy region of the spectra covers from 24.5 to30.0 eV, where many ns, np, and nd autoionizing resonantstates from the 3s orbital of Ar exist with thecontinuum background from the 3p orbital. We compare the calculatedspectra to recent energy-loss spectra measurements and identify the observedautoionizing resonant states. We also discuss the dependence of thespectra on the scattering angles and their physical meanings.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.80.042709
DOI:	10.1103/PhysRevA.80.042709
PACS:	34.80.Dp; 32.70.Cs; 31.15.es 34.80.Dp Atomic excitation and ionization by electron/positron impact 32.70.Cs Atomic oscillator strengths, lifetimes, transition moments 31.15.es Applications of density-functional theory (atoms and molecules) YEAR: 2009
KEYWORDS:	argon, atom-electron collisions, atom-photon collisions, autoionisation, photoionisation, resonant states

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