Collisional-radiative modeling of the $5p-5s$ spectrum of W XIV - W XVI ions

TL;DR

This paper calculates the $5p-5s$ transition spectrum of tungsten ions W XIV - W XVI using relativistic methods and constructs a collisional-radiative model to interpret experimental spectra, clarifying ionization stage assignments.

Contribution

It introduces a relativistic configuration interaction approach combined with a collisional-radiative model to accurately simulate tungsten ion spectra and resolve previous ionization stage ambiguities.

Findings

Calculated wavelengths and rates agree with experimental data.

The model successfully identifies spectral lines and ionization stages.

Clarifies previous uncertainties in ion spectra assignments.

Abstract

The wavelength and rate of the $5p-5s$ transition of W XIV - W XVI ions have been calculated by the relativistic configuration interaction (RCI) method with the implementation of Flexible Atomic code (FAC). A reasonable collisional-radiative model (CRM) has been constructed to simulate the $5p - 5s$ transition spectrum of W XIV - W XVI ions which had been observed in electron beam ion trap (EBIT) device. The results are in reasonable agreement with the available experimental and theoretical data, and might be applied to identify the controversial spectra. The confusion on the assignment of the ionization stage are solved in the present work.