Large-scale Multiconfiguration Dirac-Hartree-Fock Calculations for Astrophysics: C-like Ions from O iii to Mg vii


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Authors
Li, JQ 
Zhang, CY 
Del Zanna, G 
Jönsson, P 
Godefroid, M 
Abstract

jats:titleAbstract</jats:title> jats:pLarge-scale multiconfiguration Dirac–Hartree–Fock calculations are provided for the jats:italicn</jats:italic> ≤ 5 states in C-like ions from O jats:sciii</jats:sc> to Mg jats:scvii</jats:sc>. Electron correlation effects are accounted for by using large configuration state function expansions, built from sets of orbitals with principal quantum numbers jats:italicn</jats:italic> ≤ 10. An accurate and complete data set of excitation energies, wavelengths, radiative transition parameters, and lifetimes is offered for the 156 (196, 215, 272, 318) lowest states of the 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic> jats:sup2</jats:sup>, 2jats:italics</jats:italic>2jats:italicp</jats:italic> jats:sup3</jats:sup>, 2jats:italicp</jats:italic> jats:sup4</jats:sup>, 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>3jats:italics</jats:italic>, 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>3jats:italicp</jats:italic>, 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>3jats:italicd</jats:italic>, 2jats:italics</jats:italic>2jats:italicp</jats:italic> jats:sup2</jats:sup>3jats:italics</jats:italic>, 2jats:italics</jats:italic>2jats:italicp</jats:italic> jats:sup2</jats:sup>3jats:italicp</jats:italic>, 2jats:italics</jats:italic>2jats:italicp</jats:italic> jats:sup2</jats:sup>3jats:italicd</jats:italic>, 2jats:italicp</jats:italic> jats:sup3</jats:sup>3jats:italics</jats:italic>, 2jats:italicp</jats:italic> jats:sup3</jats:sup>3jats:italicp</jats:italic>, 2jats:italicp</jats:italic> jats:sup3</jats:sup>3jats:italicd</jats:italic>, 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>4jats:italics</jats:italic>, 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>4jats:italicp</jats:italic>, 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>4jats:italicd</jats:italic>, 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>4jats:italicf</jats:italic>, 2jats:italics</jats:italic>2jats:italicp</jats:italic> jats:sup2</jats:sup>4jats:italics</jats:italic>, 2jats:italics</jats:italic>2jats:italicp</jats:italic> jats:sup2</jats:sup>4jats:italicp</jats:italic>, 2jats:italics</jats:italic>2jats:italicp</jats:italic> jats:sup2</jats:sup>4jats:italicd</jats:italic>, 2jats:italics</jats:italic>2jats:italicp</jats:italic> jats:sup2</jats:sup>4jats:italicf</jats:italic>, 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>5jats:italics</jats:italic>, 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>5jats:italicp</jats:italic>, 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>5jats:italicd</jats:italic>, 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>5jats:italicf</jats:italic>, and 2jats:italics</jats:italic> jats:sup2</jats:sup>2jats:italicp</jats:italic>5jats:italicg</jats:italic> configurations in O jats:sciii</jats:sc> (F jats:sciv</jats:sc>, Ne jats:scv</jats:sc>, Na jats:scvi</jats:sc>, Mg jats:scvii</jats:sc>). By comparing available experimental wavelengths with the MCDHF results, the previous line identifications for the jats:italicn</jats:italic> = 5, 4, 3 → jats:italicn</jats:italic> = 2 transitions of Na jats:scvi</jats:sc> in the X-ray and EUV wavelength range are revised. For several previous identifications discrepancies are found, and tentative new (or revised) identifications are proposed. A consistent atomic data set including both energy and transition data with spectroscopic accuracy is provided for the lowest hundreds of states for C-like ions from O jats:sciii</jats:sc> to Mg jats:scvii</jats:sc>.</jats:p>

Description
Keywords
5102 Atomic, Molecular and Optical Physics, 51 Physical Sciences
Journal Title
Astrophysical Journal, Supplement Series
Conference Name
Journal ISSN
0067-0049
1538-4365
Volume Title
260
Publisher
American Astronomical Society
Sponsorship
National Natural Science Foundation of China (NSFC) (12074081)