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

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 diff...

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Bibliographic Details
Published in:arXiv.org 2019-09
Main Authors: Atalay, Betül, Brage, Tomas, Jönsson, Per, Hartman, Henrik
Format: Article
Language:English
Subjects:
Configuration interaction
Energy levels
Mathematical analysis
Rydberg series
Silicon
Online Access:Get full text
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Summary: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 IV. 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.
ISSN:2331-8422
DOI:10.48550/arxiv.1909.04090