New spectroscopic data for atomic tungsten XIV

M Raineri,C J B Pagan,M Gallardo,J Reyna Almandos

doi:10.1088/1742-6596/583/1/012006

Abstract

The thirteen times ionized tungsten is isoelectronic with PmI. Wavelengths and transition probabilities for the 5s-5p and 5p-5d transitions of WXIV, identifying the ground state as 4f13 5s2 2F7/2 were calculated. Both, a relativistic Hartree Fock approach, including core-polarization effects, and a purely relativistic multiconfiguration Dirac-Fock method were used for the calculations. Particularly, 5s-5p transitions were compared with experimental results obtained with VUV electron beam ion trap (EBIT) spectroscopy.

Highlights

The thirteen times ionized tungsten (WXIV) is isoelectronic with PmI
We took into account the core polarization effects that refer to the deformation of the internal atomic orbitals due to the orbit of the active electron, which repels the remaining electrons
The Relativistic Hartree–Fock method In Cowan’s package, wavefunctions are calculated in a Hartree–Fock approximation with relativistic corrections

Summary

Introduction

The thirteen times ionized tungsten (WXIV) is isoelectronic with PmI. Reliable spectroscopic parameters in the tungsten atom are of fundamental importance for the study of fusion plasmas, but some discrepancies remain unsolved. Raftopoulos [2] used a more sophisticated multiconfigurational relativistic approach to identify the ground state as 4f13 5s2 2F5/2, but predicting the wavelengths of 5s-5p transitions far away from the experimental values [3].

Results

Conclusion