EUV and Visible Spectroscopy of Promethiumlike Heavy Ions

TL;DR

This study reports EUV and visible spectra of promethiumlike tungsten and gold ions using EBIT, identifying charge states through time-of-flight analysis and comparing results with models and prior studies.

Contribution

First to combine spectroscopic measurements with charge state identification via time-of-flight analysis for promethiumlike heavy ions.

Findings

Charge states of tungsten and gold ions are definitively identified.

Spectroscopic data agree with collisional-radiative models.

Comparison with previous studies validates the results.

Abstract

We present extreme ultraviolet and visible spectra of promethiumlike tungsten and gold obtained with an electron beam ion trap (EBIT). Although the contributions from a few charge states are involved in the spectra, the charge state of the ion assigned to the observed lines is definitely identified by the time-of-flight analysis of the ions performed at the same time with the spectroscopic measurements. Experimental results are compared with collisional-radiative model calculations as well as previous experimental and theoretical studies.