Oscillator strengths and transition probabilities for the W xlv ion

• Published in: Journal of physics. B, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2014-12, Vol.47 (24), p.245001-11
• Main Authors: Spencer, S, Hibbert, A, Ramsbottom, C A
• Format: Article
• Language: English
• Subjects: Ab initio calculations; Approximation; Atomic and molecular physics; atomic processes; Atomic properties and interactions with photons; Calculations and mathematical techniques in atomic and molecular physics (excluding electron correlation calculations); Configuration interaction; Electronic structure of atoms, molecules and their ions: theory; Exact sciences and technology; Inclusions; Intensities and shapes of atomic spectral lines; Mathematical analysis; Mathematical models; Oscillator strengths; Oscillator strengths, lifetimes, transition moments; Physics; Relativistic effects; Transition probabilities; transitions; tungsten
• ISSN: 0953-4075; 1361-6455
• DOI: 10.1088/0953-4075/47/24/245001

In this paper we present oscillator strengths and transition probabilities for W xlv transitions between levels arising from configurations 3d104s2,4p2,4d2, 3d104k4l (k = s,p,d,f and l = p,d,f), 3d94s24l (l = p,d,f) and 3d94s4p2. The model used to calculate these contained all configurations which can be constructed from the available orbitals (up to n = 4), with either a 3d10 or 3d9 core. The calculations were performed with the configuration interaction CIV3 program with the inclusion of relativistic effects achieved through the use of the Breit-Pauli approximation. We compare our ab initio energy levels, oscillator strengths and transition rates with other experimental and theoretical values available in the literature. There is generally good agreement when only levels with 3d10 cores are considered. The literature is sparse for levels in which the 3d-subshell is opened: for the majority of the fine-structure lines considered, there is either no comparison data available or substantial differences are found. This paper also investigates how the inclusion of relativistic effects can result in a significant redistribution of the oscillator strength from the LS calculations.