Photoabsorption of the ground state of Ne and of Ne-like Na+, Mg2+, Al3+, Si4+, P5+, S6+, and Cl7+ ions

Photoabsorption of the 1s22s22p6 (1S0) ground state of Ne-like ions is presented in this paper. Resonance energies and width of the 2s2p6np1P1 series of Ne and Ne-like Na+, Mg2+, Al3+, Si4+, P5+, S6+, and Cl7+ ions are reported. Wavelengths of the 2s22p6 (1S0) →2s22p5(2P3/2,1/2)nd transitions in neon-like Na+ ion and of the 2s22p6(1S0)→2s2p6np1P1 transitions in Ne and in Ne-like Na+, Mg2+, Al3+, Si4+, P5+, S6+, and Cl7+ ions are tabulated. Analysis of the resonances investigated is done in the framework of the LS, jj and JK coupling schemes. All the calculations are made using the Screening constant by unit nuclear charge (SCUNC) formalism. Very good agreement is found between the SCUNC results and various experimental and theoretical literature values and new data for the Ne-like Si4+, P5+, S6+, and Cl7+ ions are listed.