Investigation of optical spectroscopy in W13+ ions.

This study presents the investigation of magnetic dipole transition lines of W13+ ions in the wavelength range of 200 - 700 nm at a low-energy electron beam ion trap. Seventeen lines emitted from W13+ ions have been observed with three being reported experimentally for the first time. The atomic structure calculation and spectra simulation of W13+ ions have been carried out using the multi-configuration Dirac-Hartree–Fock (MCDHF) method combined with the relativistic configuration interaction (RCI) approach and the collisional-radiative model (CRM), respectively. The theoretical calculations are in reasonable agreement with the experimental observations, and most of the observed lines have been identified.