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MCDHF and RCI calculations of energy levels, lifetimes, and transition rates in Si III and Si IV

Atalay, B. LU ; Brage, T. LU ; Jönsson, P. and Hartman, H. (2019) In Astronomy and Astrophysics 631.
Abstract

We present extensive multiconfiguration Dirac-Hartree-Fock and relativistic configuration interaction calculations including 106 states in doubly ionized silicon (Si III) and 45 states in triply ionized silicon (Si IV), which are important for astrophysical determination of plasma properties in different objects. These calculations represents an important extension and improvement of earlier calculations especially for Si III. The calculations are in good agreement with available experiments for excitation energies, transition properties, and lifetimes. Important deviations from the NIST-database for a selection of perturbed Rydberg series are discussed in detail.

Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Atomic data
in
Astronomy and Astrophysics
volume
631
article number
A29
publisher
EDP Sciences
external identifiers
  • scopus:85103687785
ISSN
0004-6361
DOI
10.1051/0004-6361/201935618
language
English
LU publication?
yes
id
d17ed426-c7d8-4916-83e4-505177cd1ef4
date added to LUP
2022-03-30 15:35:09
date last changed
2022-03-30 17:00:48
@article{d17ed426-c7d8-4916-83e4-505177cd1ef4,
  abstract     = {{<p>We present extensive multiconfiguration Dirac-Hartree-Fock and relativistic configuration interaction calculations including 106 states in doubly ionized silicon (Si III) and 45 states in triply ionized silicon (Si IV), which are important for astrophysical determination of plasma properties in different objects. These calculations represents an important extension and improvement of earlier calculations especially for Si III. The calculations are in good agreement with available experiments for excitation energies, transition properties, and lifetimes. Important deviations from the NIST-database for a selection of perturbed Rydberg series are discussed in detail.</p>}},
  author       = {{Atalay, B. and Brage, T. and Jönsson, P. and Hartman, H.}},
  issn         = {{0004-6361}},
  keywords     = {{Atomic data}},
  language     = {{eng}},
  month        = {{11}},
  publisher    = {{EDP Sciences}},
  series       = {{Astronomy and Astrophysics}},
  title        = {{MCDHF and RCI calculations of energy levels, lifetimes, and transition rates in Si III and Si IV}},
  url          = {{http://dx.doi.org/10.1051/0004-6361/201935618}},
  doi          = {{10.1051/0004-6361/201935618}},
  volume       = {{631}},
  year         = {{2019}},
}