2019/11/10 by K. Wang, P. Jönsson, G. Del Zanna +4
Physics and Astronomy · #Advanced Chemical Physics Studies #Atomic and Molecular Physics #Basis set #Configuration interaction #Excitation #Ion #Nuclear physics research studies #Perturbation theory (quantum mechanics) #Radiative transfer #Relativistic quantum chemistry #astro-ph.SR #physics.atom-ph
paper · pdf · doi:10.3847/1538-4365/ab5530
arxiv created 2019/11/10 · openalex created_date 2019/11/22 · openalex publication_date 2019/12/17 · arxiv updated 2020/01/08 · openalex updated_date 2026/08/06
Abstract We use the multiconfiguration Dirac–Hartree–Fock (MCDHF) method combined with the relativistic configuration interaction approach (GRASP2K) to provide a consistent set of transition energies and radiative transition data for the lower n = 3 states in all Cl-like ions of astrophysical importance, from Cr viii to Zn xiv . We also provide excitation energies calculated for Fe x using the many-body perturbation theory (MBPT, implemented within FAC). The comparison of the present MCDHF results with MBPT and with the available experimental energies indicates that the theoretical excitation energies are highly accurate, with uncertainties of only a few hundred cm −1 . Detailed comparisons for Fe x and Ni xii highlight discrepancies in the experimental energies found in the literature. Several new identifications are proposed.