Photoabsorption of the ground state of Ne and of Ne-like Na+, Mg

Photoionization of Ne Atom Ions in the Framework of the Modified Atomic Orbital Theory

“…It should be underlined that, the present MAOT values for n = 3 and n = 4 match more with the calculations of Stener et al [12], Nrisimhamurty et al [13] and with the measurements of Codling et al [4]. For n > 4, comparison shows excellent agreements with the SCUNC calculations [6] and the NC results [5] up to n = 20. Table 4 presents resonance energy of the 1s2s 2 2p 6 np 1 P 1 series of neutral Ne atom.…”

“…A shown in the work of Schulz et al [5] for the n > 7 members exhibiting weak observable relativistic effects, the resonances are classified according to the relativistic jK coupling. Comparison shows that the MAOT results agree well with both the SCUNC calculations [6] and NC results [5] for n < 10. But for n > 9, the MAOT predictions are less precise.…”

“…Schulz et al [5] performed high resolution at 3 meV in the photon energy range 44-53 eV to resolved new relativistic features of highly excited resonances of Ne converging to different fine structure threshold 2p 4 ( 3 P)3s 2 P and 2p 4 ( 3 P)3p 2 P states of Ne + . Using the Screening Constant by Unit Nuclear Charge (SCUNC) formalism, Sakho [6] reported accurate Photoabsorption data of Ne and of Ne-like Na + , Mg 2 + , Al 3 + , Si 4 + , P 5 + , S 6 + , and Cl 7 + ions. Recently, Müller et al [7] investigated single, double, and triple photoionization of Ne + ions by single photons at the synchrotron radiation source PETRA III in Hamburg, Germany.…”

“…These authors reported natural widths and excitation energies of the Ne (1s2s 2 2p 6 np 1 P 1 ) Levels with (n = 3, 4, 5, 6) from the ground state of Ne. Schulz et al [5] shown that photoionization of the 2s 2 2p 6 1 S ground state of Ne is characterized at photon energies from 44 to 53 eV, by singly excited 2s2p 6 np autoionizing Rydberg series and by overlapping doubly excited 2p 4 3snp and 2p 4 3pnl (l = s, d) autoionizing Rydberg series. The doubly excited resonances can be photoexcited mainly through the presence of electron correlations in the initial 2s 2 2p 6 1 S state.…”

“…Table1lists resonance energy of the 1s 2 2s2p 6 np 1 P 1 series of Ne. Comparison of the present calculations from the Modified atomic orbital theory (MAOT) is done with other theoretical data from the Screening constant by unit nuclear charge (SCUNC) calculations of Sakho[6] and from the Numerical calculations (NC) of Schulz et al[5] and with experimental data from Synchrotron radiation (SR) experiments of Schulz et al[5] and from Photoabsorption (PA) experiments of Codling et al[4]. The σ i -screening constants in Eqs.…”