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Title: A validation of a simple model for the calculation of the ionization energies in X-ray laser-cluster interactions

The outer-ionization of an electron from a cluster is an unambiguous quantity, while the inner-ionization threshold is not, resulting in different microscopic quantum-classical hybrid models used in laser-cluster interactions. A simple local ionization threshold model for the change in the ionization energy is proposed and examined, for atoms and ions, at distances in between the initial configuration of the cluster to well into the cluster's disintegration. This model is compared with a full Hartree-Fock energy calculation which accounts for the electron correlation effects using the coupled cluster method with single and double excitations with perturbative triples (CCSD(T)). Good agreement is found between the two lending a strong theoretical support to works which rely on such models for the final and transient properties of the laser-cluster interaction.
Authors:
;  [1]
  1. Department of Physics, Southern Illinois University Edwardsville, Edwardsville, Illinois 62026 (United States)
Publication Date:
OSTI Identifier:
22408076
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 2; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ATOMIC CLUSTERS; ATOMS; COMPARATIVE EVALUATIONS; ELECTRON CORRELATION; ELECTRONS; EXCITATION; HARTREE-FOCK METHOD; INTERACTIONS; IONIZATION; IONS; MATHEMATICAL MODELS; VALIDATION; X-RAY LASERS