G. Merkelis et al., MBPT CALCULATION OF ENERGY-SPECTRA AND EL TRANSITION-PROBABILITIES FOR BORON ISOELECTRONIC SEQUENCE, Physica scripta. T, 51(2), 1995, pp. 233-251
The energy spectra and the electric dipole transitions in the boron is
oelectronic sequence (Z = 8 - 26) between the levels of the 1s(2)2s(2)
2p, 1s(2)2s2p(2) and 1s(2)2p(3) configurations were considered. The st
ationary second-order many-body perturbation theory (MBPT) was used to
account for the electron correlations. The relativistic corrections w
ere included in the Breit-Pauli approximation.