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Title: Photoexcitation of K-shell and L-shell Hollow Beryllium

We have observed K-shell and L-shell hollow beryllium atoms (2s{sup 2}2p3s and 1s3s{sup 2}3p) created by photoexcitation using synchrotron radiation. Resonance shapes were fitted to the Fano profile and the parameters were deduced. A Dirac-Fock calculation was performed to identify the configuration of the peaks and to predict other hollow atomic peaks. The results of the calculation were in good agreement with the experimental data. The comparison of the transition strength has revealed that the three-electron photoexcitation to the 1s3s{sup 2}3p configuration is stronger than the two-electron photoexcitation to the 2s{sup 2}2p3s configuration. This is attributed to the large overlap between the 2s orbital of the ground state (1s{sup 2}2s{sup 2}) with the 3s orbital of the L-shell hollow state (1s3s{sup 2}3p)
Authors:
; ;  [1] ;  [2] ;  [3] ; ;  [4] ;  [5]
  1. Department of Quantum Engineering and Systems Science, University of Tokyo, Tokyo 113-8656 (Japan)
  2. School of Medicine, Kitasato University, Kanagawa 228-8555 (Japan)
  3. Physics Department, Kassel University, D-34132 Kassel (Germany)
  4. Photon Factory, KEK, Ibaraki 305-0801 (Japan)
  5. Department of Physics, Meisei University, Tokyo 191-8506 (Japan)
Publication Date:
OSTI Identifier:
20860507
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 97; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevLett.97.023001; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; BERYLLIUM; ELECTRONS; EXPERIMENTAL DATA; GROUND STATES; K SHELL; L SHELL; SYNCHROTRON RADIATION