X-ray wavelengths and Auger transition energies of 1s 2p⁴(²S,^2,4P,²D) resonances in B-like (Z = 6–18) ions

Abstract

We report Auger energies of the 1s 2p 4 ( 2 S, 2,4 P, 2 D) resonances belonging to the 1s 2p 4 ( 2 S, 2,4 P, 2 D) → 1s 2 2p 2 ( 1 S, 1 P, 1 D) and to the 1s 2p 4 ( 2 S, 2,4 P, 2 D) → 1s 2 2s2p 1,3 P transitions in B-like ions (Z = 6-18). X-ray wavelengths of the 1s2p 4 ( 2 S, 2 P, 2 D) resonances are also reported. The calculations are carried out in the framework of the screening constant by unit nuclear charge (SCUNC) formalism. The present results for the core-excited 1s 2p 4 ( 2 S, 2,4 P, 2 D) resonances in B-like C + , O 3+ , Ne 5+ , Mg 7+ and Si 9+ ions agree well with recent saddle-point variation and saddle-point complex-rotation (SPCR) results (Sun et al 2013 Phys. Rev A 87 032509). The new Auger energies and wavelengths for the 1s 2p 4 ( 2 S, 2,4 P, 2 D) resonances in B-like N 2+ , F 4+ , Na 6+ , Al 8+ , P 10+ , S 11+ , Cl 12+ and Ar 13+ ions provide benchmarked values for future experimental and theoretical studies on these B-like ions in connection with the diagnostic of astrophysical and laboratory plasma.

Calculations of 2<i>sns</i><sup>+1,3</sup><i>S</i><sup>e</sup>, 2<i>snp</i><sup>+1,3</sup><i>P<sup>0</sup></i>, 2<i>pnp</i><sup>+1,3</sup><i>D<sup>e</sup></i> Autoionizing Sta

“…[33][34] It has been demonstrated the possibilities to use the screening constant by unit nuclear charge method in the study of Table 5 -8). One can notice that, the merit of the Screening Constant by Unit Nuclear Charge method is to give the possibilities to calculate accurate energies for doubly excited states in two electron systems using a variational procedure.…”