Energies, radiative and Auger transitions of the core-excited states for the boron atom

Energies, radiative and Auger transitions of the 1s vacancy resonances 1s2s²2p², 1s2s²2p3p, 1s2s2p³, 1s2p⁴, and 1s2p³3p, ⁴L (L=S, P, D) for the neutral boron atom are calculated using the saddle-point variation and saddle-point complex-rotation methods. Large-scale wave functions are used to obtain reliable results. Relativistic and mass polarization corrections are included by the first-order perturbation theory. The calculated term energies, x-ray wavelengths, and Auger electron energies for these core-excited states are compared with available theoretical and experimental results. Auger electron energies and branching ratios are used to identify high-resolution B Auger spectrum produced in 300keV B⁺ on CH₄ collision experiment. It is found that the Auger decay of core-excited states of the boron atom gives significant contributions to Auger spectrum in the range of 165-210eV, and many previously unknown line identifications are presented.