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Title: One- and two-photon ionization of hydrogen atom embedded in Debye plasmas

We present a detailed analysis of the plasma-induced resonance-like atomic structures near the ionization threshold in one- and two-photon ionization of hydrogen atom. Such resonance-like structures result from the migration of the upper bound excited states of bound-bound atomic transitions into the continuum due to the less attractive screened Coulomb potential which simulates the external environmental effect for an atom embedded in Debye plasma. The change from the resonance-like narrow structures into broad continuous spectra as the plasma effect increases could be accounted for by the overlap between the respective wavefunctions of the atomic electron in the initial state and its corresponding outgoing ionized state in the continuum.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089-0484 (United States)
  2. Department of Physics, Fu Jen Catholic University, Taipei 242, Taiwan (China)
  3. Institute of Atomic and Molecular Sciences, Academia Sinica, P. O. Box 23-166, Taipei 106, Taiwan (China)
Publication Date:
OSTI Identifier:
22220577
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 9; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOMS; COULOMB FIELD; ELECTRONS; EXCITED STATES; HYDROGEN; PHOTOIONIZATION; PHOTONS; PLASMA; POTENTIAL ENERGY; RESONANCE; SPECTRA; WAVE FUNCTIONS