Hyperfine structures and Land\'e $g_J$-factors for $n=2$ states in beryllium-, boron-, carbon-, and nitrogen-like ions from relativistic configuration interaction calculations

TL;DR

This paper presents detailed relativistic configuration interaction calculations of energy levels, hyperfine constants, and Landé g-factors for n=2 states in various isoelectronic ions, enhancing understanding of their atomic structure.

Contribution

It provides comprehensive relativistic calculations of hyperfine structures and Landé g-factors for n=2 states in multiple ions, including correlation effects, with systematic comparison to existing data.

Findings

Calculated hyperfine constants show good agreement with literature.

Relativistic effects significantly influence Landé g-factors.

Correlation effects are crucial for accurate energy level predictions.

Abstract

Energy levels, hyperfine interaction constants, and Land\'e $g_J$-factors are reported for n=2 states in beryllium-, boron-, carbon-, and nitrogen-like ions from relativistic configuration interaction calculations. Valence, core-valence, and core-core correlation effects are taken into account through single and double-excitations from multireference expansions to increasing sets of active orbitals. A systematic comparison of the calculated hyperfine interaction constants is made with values from the available literature.