37 citations · 46 across the 6 of their papers we have counts for
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Studies of Lanthanides 6s Ionization Energy
G. Gaigalas, Z. Rudzikas, T. Zalandauskas
This work is aimed at the multi-configuration Hartree-Fock calculations of the 6s ionization energies of lanthanides with configurations [Xe]4f^{N}6s^{2}. Authors have used the ATS…
On the secondly quantized theory of many-electron atom
G. Gaigalas, Z. Rudzikas
Traditional theory of many-electron atoms and ions is based on the coefficients of fractional parentage and matrix elements of tensorial operators, composed of unit tensors. Then t…
Optimal classification of HCI spectra
G. Gaigalas, R. Karpuskiene, Z. Rudzikas
Energy levels of highly charged ions as a rule cannot be classified using LS coupling due to rapid increase of relativistic effects. It is suggested, for optimal classification of…
Secondly quantized multi-configurational approach for atomic databases
G. Gaigalas, Z. Rudzikas
General method is suggested to find non-relativistic and relativistic matrix elements of one- and two-electron operators for any number of open shells in atom, requiring neither co…
Analytical expressions for special cases of LS-jj transformation matrices for a shell of equivalent electrons
G. Gaigalas, T. Zalandauskas, Z. Rudzikas
Transformation matrices of the weights of the atomic wave functions in jj coupling to the relevant weights of LS coupling are considered for a shell of equivalent electrons. Their…
Studies of Er ionization energy
G. Gaigalas, Z. Rudzikas, T. Zalandauskas
This work is aimed at the multiconfigurational Hartree-Fock calculations of the Er ionization energy. Authors have used the ATSP MCHF version in which there are new codes for calcu…