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Title: Parametric CI+MBPT calculations of Th I energies and g-factors for even states

In this study, we study energies and g-factors for a large number of levels of Th I. We found that the accuracy of configuration-interaction many-body perturbation theory can be substantially improved by using multiple adjustment parameters, which are introduced to regulate the second-order MBPT corrections for single-valence energies and Coulomb interaction. The results for energies and g-factors are in excellent agreement with experiment, with accuracy sufficient to positively assign theoretical states of given angular momentum and parity to experimental levels. Finally, this theory will be further developed in the future to treat other, even more complicated, actinides such as U I.
Authors:
ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-17-21886
Journal ID: ISSN 0953-4075
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Journal of Physics. B, Atomic, Molecular and Optical Physics
Additional Journal Information:
Journal Volume: 50; Journal Issue: 16; Journal ID: ISSN 0953-4075
Publisher:
IOP Publishing
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS
OSTI Identifier:
1458954

Savukov, I. M.. Parametric CI+MBPT calculations of Th I energies and g-factors for even states. United States: N. p., Web. doi:10.1088/1361-6455/aa8017.
Savukov, I. M.. Parametric CI+MBPT calculations of Th I energies and g-factors for even states. United States. doi:10.1088/1361-6455/aa8017.
Savukov, I. M.. 2017. "Parametric CI+MBPT calculations of Th I energies and g-factors for even states". United States. doi:10.1088/1361-6455/aa8017. https://www.osti.gov/servlets/purl/1458954.
@article{osti_1458954,
title = {Parametric CI+MBPT calculations of Th I energies and g-factors for even states},
author = {Savukov, I. M.},
abstractNote = {In this study, we study energies and g-factors for a large number of levels of Th I. We found that the accuracy of configuration-interaction many-body perturbation theory can be substantially improved by using multiple adjustment parameters, which are introduced to regulate the second-order MBPT corrections for single-valence energies and Coulomb interaction. The results for energies and g-factors are in excellent agreement with experiment, with accuracy sufficient to positively assign theoretical states of given angular momentum and parity to experimental levels. Finally, this theory will be further developed in the future to treat other, even more complicated, actinides such as U I.},
doi = {10.1088/1361-6455/aa8017},
journal = {Journal of Physics. B, Atomic, Molecular and Optical Physics},
number = 16,
volume = 50,
place = {United States},
year = {2017},
month = {7}
}