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Title: Correlation and relativistic effects in actinide ions

Abstract

Wavelengths, line strengths, and transition rates are calculated for the multipole (E1, M1, E2, M2, E3, and M3) transitions between the excited 6s{sup 2}6p{sup 5}nl and 6s6p{sup 6}nl states and the ground 6s{sup 2}6p{sup 6} state in Ac{sup 3+}, Th{sup 4+}, and U{sup 6+} Rn-like ions. Relativistic many-body perturbation theory (RMBPT), including the Breit interaction, is used to evaluate energies and transition rates for multipole transitions in these hole-particle systems. The RMBPT method agrees with multiconfigurational Dirac-Fock (MCDF) calculations in lowest order, includes all second-order correlation corrections, and includes corrections from negative-energy states. The calculations start from a [Xe]4f{sup 14}5d{sup 10}6s{sup 2}6p{sup 6} Dirac-Fock potential. First-order perturbation theory is used to obtain intermediate-coupling coefficients, and second-order RMBPT is used to determine the matrix elements. Evaluated multipole matrix elements for transitions from excited states to the ground states are used to determine the line strengths, transition rates, and multipole polarizabilities. This work provides a number of yet unmeasured properties of these actinide ions for various applications and for benchmark tests of theory and experiment.

Authors:
 [1];  [2]
  1. Physics Department, University of Nevada, Reno, Nevada 89557 (United States)
  2. Department of Physics and Astronomy, 217 SharpLab, University of Delaware, Newark, Delaware 19716 (United States)
Publication Date:
OSTI Identifier:
22093516
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 5; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ACTINIUM IONS; CORRECTIONS; CORRELATIONS; E1-TRANSITIONS; E3-TRANSITIONS; EXCITED STATES; GROUND STATES; INTERMEDIATE COUPLING; M1-TRANSITIONS; M3-TRANSITIONS; MANY-BODY PROBLEM; MATRIX ELEMENTS; NEGATIVE ENERGY STATES; PERTURBATION THEORY; POLARIZABILITY; POTENTIALS; RELATIVISTIC RANGE; THORIUM IONS; URANIUM IONS

Citation Formats

Safronova, U. I., Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, and Safronova, M. S. Correlation and relativistic effects in actinide ions. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.052515.
Safronova, U. I., Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, & Safronova, M. S. Correlation and relativistic effects in actinide ions. United States. https://doi.org/10.1103/PHYSREVA.84.052515
Safronova, U. I., Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, and Safronova, M. S. 2011. "Correlation and relativistic effects in actinide ions". United States. https://doi.org/10.1103/PHYSREVA.84.052515.
@article{osti_22093516,
title = {Correlation and relativistic effects in actinide ions},
author = {Safronova, U. I. and Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 and Safronova, M. S.},
abstractNote = {Wavelengths, line strengths, and transition rates are calculated for the multipole (E1, M1, E2, M2, E3, and M3) transitions between the excited 6s{sup 2}6p{sup 5}nl and 6s6p{sup 6}nl states and the ground 6s{sup 2}6p{sup 6} state in Ac{sup 3+}, Th{sup 4+}, and U{sup 6+} Rn-like ions. Relativistic many-body perturbation theory (RMBPT), including the Breit interaction, is used to evaluate energies and transition rates for multipole transitions in these hole-particle systems. The RMBPT method agrees with multiconfigurational Dirac-Fock (MCDF) calculations in lowest order, includes all second-order correlation corrections, and includes corrections from negative-energy states. The calculations start from a [Xe]4f{sup 14}5d{sup 10}6s{sup 2}6p{sup 6} Dirac-Fock potential. First-order perturbation theory is used to obtain intermediate-coupling coefficients, and second-order RMBPT is used to determine the matrix elements. Evaluated multipole matrix elements for transitions from excited states to the ground states are used to determine the line strengths, transition rates, and multipole polarizabilities. This work provides a number of yet unmeasured properties of these actinide ions for various applications and for benchmark tests of theory and experiment.},
doi = {10.1103/PHYSREVA.84.052515},
url = {https://www.osti.gov/biblio/22093516}, journal = {Physical Review. A},
issn = {1050-2947},
number = 5,
volume = 84,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 2011},
month = {Tue Nov 15 00:00:00 EST 2011}
}