Energies, expectation values, fine structures and hyperfine structures of the ground state and excited states for boron

The 1s ²2s ²2p ²P ground state and the 1s ²2s ² np (n = 3, 4) ²P, 1s ²2s ²3s ²S, 1s ²2s2p ^{2 4}P, ²L (L = S, P, D), 1s ²2s2p3s ⁴P^o, 1s ²2s2p3p ⁴S, and 1s ²2p ^{3 4}S ^o, ²L^o (L = P, D) excited states of boron are calculated using the Rayleigh-Ritz variational method with multiconfiguration interaction wave functions. Energies, expectation values such as the electron density at the nucleus ρ(0) and radial moments 〈r ⁿ 〉, and fine-structure splittings are calculated. Hyperfine structure parameters and magnetic coupling constants of these states are also calculated. The present results are in good agreement with theoretical and experimental data available in the literature and should provide valuable reference data for future theoretical calculations and experimental measurements. Graphical abstract: [Figure not available: see fulltext.].