# Theoretical investigation on the soft X-ray spectrum of the highly-charged W$^{54+}$ ions

## TL;DR

This paper models the soft X-ray spectrum of highly-charged W$^{54+}$ ions using relativistic atomic calculations, providing synthetic spectra that match experimental data and predicting new observable transitions.

## Contribution

It presents a detailed collisional-radiative model for W$^{54+}$ ions, with atomic data computed via RCI and FAC, and offers predictions for future EBIT experiments.

## Key findings

- Synthetic spectrum explains existing EBIT data.
- Proposes new strong transitions for future observation.
- Atomic data aligns well with previous results.

## Abstract

A detailed level collisional-radiative model of the E1 transition spectrum of Ca-like W$^{54+}$ ion has been constructed. All the necessary atomic data has been calculated by relativistic configuration interaction (RCI) method with the implementation of Flexible Atomic Code (FAC). The results are in reasonable agreement with the available experimental and previous theoretical data. The synthetic spectrum has explained the EBIT spectrum in 29.5-32.5 \AA ,, while several new strong transitions has been proposed to be observed in 18.5-19.6 \AA , for the future EBIT experiment with electron density $n_e$ = $10^{12}$ cm$^{-3}$ and electron beam energy $E_e$ = 18.2 keV.