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Title: Large-dimension configuration-interaction calculations of positron binding to the group-II atoms

Abstract

The configuration-interaction (CI) method is applied to the calculation of the structures of a number of positron binding systems, including e{sup +}Be, e{sup +}Mg, e{sup +}Ca, and e{sup +}Sr. These calculations were carried out in orbital spaces containing about 200 electron and 200 positron orbitals up to l=12. Despite the very large dimensions, the binding energy and annihilation rate converge slowly with l, and the final values do contain an appreciable correction obtained by extrapolating the calculation to the l{yields}{infinity} limit. The binding energies were 0.00317 hartree for e{sup +}Be, 0.0170 hartree for e{sup +}Mg, 0.0189 hartree for e{sup +}Ca, and 0.0131 hartree for e{sup +}Sr.

Authors:
;  [1];  [2]
  1. Department of Physics, San Diego State University, San Diego, California 92182 (United States)
  2. (Australia)
Publication Date:
OSTI Identifier:
20786902
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.73.032507; (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; ANNIHILATION; ATOMS; BERYLLIUM; BINDING ENERGY; CALCIUM; CONFIGURATION INTERACTION; CORRECTIONS; ELECTRONS; MAGNESIUM; POSITRONS; SPACE; STRONTIUM

Citation Formats

Bromley, M. W. J., Mitroy, J., and Faculty of Technology, Charles Darwin University, Darwin NT 0909. Large-dimension configuration-interaction calculations of positron binding to the group-II atoms. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.0.
Bromley, M. W. J., Mitroy, J., & Faculty of Technology, Charles Darwin University, Darwin NT 0909. Large-dimension configuration-interaction calculations of positron binding to the group-II atoms. United States. doi:10.1103/PHYSREVA.73.0.
Bromley, M. W. J., Mitroy, J., and Faculty of Technology, Charles Darwin University, Darwin NT 0909. Wed . "Large-dimension configuration-interaction calculations of positron binding to the group-II atoms". United States. doi:10.1103/PHYSREVA.73.0.
@article{osti_20786902,
title = {Large-dimension configuration-interaction calculations of positron binding to the group-II atoms},
author = {Bromley, M. W. J. and Mitroy, J. and Faculty of Technology, Charles Darwin University, Darwin NT 0909},
abstractNote = {The configuration-interaction (CI) method is applied to the calculation of the structures of a number of positron binding systems, including e{sup +}Be, e{sup +}Mg, e{sup +}Ca, and e{sup +}Sr. These calculations were carried out in orbital spaces containing about 200 electron and 200 positron orbitals up to l=12. Despite the very large dimensions, the binding energy and annihilation rate converge slowly with l, and the final values do contain an appreciable correction obtained by extrapolating the calculation to the l{yields}{infinity} limit. The binding energies were 0.00317 hartree for e{sup +}Be, 0.0170 hartree for e{sup +}Mg, 0.0189 hartree for e{sup +}Ca, and 0.0131 hartree for e{sup +}Sr.},
doi = {10.1103/PHYSREVA.73.0},
journal = {Physical Review. A},
number = 3,
volume = 73,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}