Benchmarking Atomic Data for Astrophysics: Be-like Ions between B II and Ne VII

TL;DR

This paper provides a comprehensive and highly accurate set of atomic data for Be-like ions from B II to Ne VII, crucial for astrophysical plasma modeling and spectral analysis.

Contribution

It presents large-scale relativistic calculations of atomic data for Be-like ions, including energies, lifetimes, and transition probabilities, with an estimated 0.01% uncertainty.

Findings

Data set enables accurate line identification in astrophysical spectra.

Uncertainty in excitation energies is about 0.01%.

Results agree well with available experimental and theoretical data.

Abstract

Large-scale self-consistent multiconfiguration Dirac--Hartree--Fock and relativistic configuration interaction calculations are reported for the $n \leq 6$ levels in Be-like ions from B II to Ne VII. Effects from electron correlation are taken into account by means of large expansions in terms of a basis of configuration state functions, and a complete and accurate data set of excitation energies, lifetimes, wavelengths, and electric dipole, magnetic dipole, electric quadrupole, and magnetic quadrupole line strengths, transition rates, and oscillator strengths for these levels is provided for each ion. Comparisons are made with available experimental and theoretical results. The uncertainty of excitation energies is assessed to be 0.01\% on average, which makes it possible to find and rule out misidentifications and aid new line identifications involving high-lying levels in astrophysical spectra. The complete data set is also useful for modeling and diagnosing astrophysical plasmas.