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Importance of the interference effect in atomic excitation and ionization accompanying inner-shell vacancy creation
Institution:1. Laboratory for Materials Science and Technology, Waseda University, Shinjuku, Tokyo 169-0051, Japan;2. Kansai Gaidai University, Hirakata, Osaka 573-1001, Japan;1. School of Physics, University of Melbourne, Victoria 3010, Australia;1. Fakultät für Physik, Universität Bielefeld, Universitätsstrasse 25, D-33615 Bielefeld, Germany;2. Strahlenzentrum der Justus Liebig-Universität Giessen, Leihgesterner Weg 217, D-35392 Giessen, Germany;1. Departamento de Fı́sica, Comisión Nacional de Energı́a Atómica, Avda. Gral. Paz 1499, CP 1650, Villa Maipú, Buenos Aires, Argentina;2. Escuela de Ciencia y Tecnologı́a. Universidad Nacional de San Martı́n, Argentina;3. CONICET, Argentina;1. JASRI/Spring-8, 1-1-1 Kouto, Mikazuki 679-5198, Japan;2. Department of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori 678-1297, Japan;3. Department of Chemistry, Hiroshima University, Higashi-Hiroshima 739-8526, Japan;1. Department of Chemistry, University of Nevada, Las Vegas, NV 89154-4003, USA;2. Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303-3083, USA;1. Department of Quantum Engineering and Systems Science, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;2. Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;3. Nuclear Professional School, School of Engineering, University of Tokyo, 2-22 Shirakatashirane, Tokai-mura, Naka-gun, Ibaraki, 319-1188, Japan;4. Takasaki Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, 1233 Watanuki-machi, Takasaki-shi, Gunma 370-1292, Japan
Abstract:A theoretical model for electron excitation and ionization of atoms following inner-shell ionization is presented. Both the sudden creation of an inner-shell vacancy and the Coulomb interaction between the ionized electron and atomic electrons are taken into account. The transition amplitude is written as the sum of the conventional shake process and the multipole transition due to the Coulomb interaction between electrons. The valence-shell excitation and ionization probabilities accompanying K-shell photoionization of Ne are calculated. It is found that the interference between the shake process and the Coulomb interaction enhances the probabilities at low energies.
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