Collisional radiative model for the M1 transition spectrum of the highly-charged W$^{54+}$ ions

TL;DR

This paper develops a detailed collisional-radiative model for the M1 transition spectrum of highly-charged W$^{54+}$ ions, providing accurate atomic data that aligns with experimental results and predicts new observable transitions.

Contribution

The paper introduces a comprehensive model based on relativistic atomic data for W$^{54+}$ ions, enhancing spectral understanding and predicting new spectral lines.

Findings

Calculated transition energies and rates agree with experimental data.

Synthetic spectrum matches observed EBIT spectrum in 12-20 nm range.

Predicted a new strong transition observable at specific electron beam energies.

Abstract

A detailed-level collisional-radiative model for the M1 transition spectrum of the Ca-like W$^{54+}$ ion as observed in an electron beam ion trap (EBIT) was constructed based on atomic data calculated by the relativistic configuration interaction method and distorted wave theory. The present calculated transition energy, rate and intensity of W$^{54+}$ M1 transitions are compared with previous theoretical and experimental values. The results are in reasonable agreement with the available experimental and theoretical data. The synthetic spectrum explained the EBIT spectrum in the 12-20 nm region, while a new possibly strong transition has been predicted to be observable with an appropriate electron beam energy. The present work provides accurate atomic data that may be used in plasma diagnostics applications.