Abstract

Abstract Energy positions and width resonances of nitrogen and oxygen atoms are reported using the Screening Constant per Unit Nuclear Charge (SCUNC) method. Calculations are performed for the 1s2s 2 2p 3 [ 5,3 S°] n p 4 P° and for the 1s2s 2 2p 3 [ 3 D°, 3 P°] n p 4 P° core-excited autoionizing resonances of atomic nitrogen converging respectively to the 5 S° and 3 S°, and to the 3 D° and 3 P° series limits of N + and for the 1s2s 2 2p 4 [ 2,4 P°] n p 3 P° Rydberg series converging to the 1s −1 4 P° and 1s −1 2 P° series limits of atomic oxygen. The results obtained agree very well with available high-resolution K -edge spectra of atomic nitrogen and of atomic oxygen. The present calculations provide benchmark data for X-ray spectra in connections with the modeling of astrophysical systems.

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