R. I. Semenov

Zeeman structure of the 1s5g and 1s6g configurations of helium

The splitting of levels of the 1s5g and 1s6g configurations of the helium atom in an external magnetic field (0–160 Oe) is obtained by using the fine-structure parameters calculated semiempirically. For each configuration, more than 50 crossings and three anticrossings of Zeeman sublevels are determined. The calculated splittings are compared with those obtained earlier for the 1snp and 1snd configurations of a neutral helium atom.

Semiempirical calculation of the fine-structure parameters for np 5 n′p configurations

The fine-structure parameters are calculated semiempirically in the intermediate coupling scheme for the np5n′p configurations of rare gas atoms and a number of ions. The calculation is based on the two-electron matrix of the energy operator, which takes into account, along with the electrostatic interaction, all magnetic interactions. Diagonalizing the energy matrix with the calculated values of the fine-structure parameters yields energy values exactly coinciding with the experimental data, as well as the coupling coefficients and the gyromagnetic ratios. The results obtained are compared with the available literature data.

Semiempirical calculation of the atomic characteristics of the 2p5 3d, 4d, and 2p5ns (n = 3–10) configurations of neon

Semiempirical calculation of the fine-structure parameters, the intermediate-coupling wave functions, and the gyromagnetic ratios is carried out for a number of configurations of the neon atom in the single-configuration approximation. Comparative analysis of the results obtained is performed.

Calculation of the fields of crossing for the 1s7h configuration of helium

The picture of magnetic level splitting for the 1s7h configuration of helium is calculated with the fine-structure parameters obtained by the semiempirical method. Only the terms linear in the magnetic field strength are taken into account in the matrix elements of the energy operator of interaction of the atom with the magnetic field. In the region of magnetic field strength up to 30 Oe, 4 anticrossings and 73 crossings of the magnetic sublevels were found. Based on the pure

On couplings types (Model representations) in semiempirical calculations of atomic systems

j_1 j_2 m_{j_1 } m_{j_2 }

Semiempirical calculation of the fine structure of the indium ion

coupling between the electron angular momenta, the results obtained are compared to the results calculated using the jj and model

Fine structure parameters of npn’f configurations

m_{l_1 } m_{l_2 } m_{s_1 } m_{s_2 }