Theoretical Studying Spectra of Ytterbium Atom on the Basis of Relativistic Many-body Perturbation Theory: Rydberg Resonances
Year: 2017
Type: article
Abstract: Theoretical studying the Rydberg autoionization resonances in spectra of the lanthanides atoms (ytterbium) is carried out within the relativistic many-body perturbation theory and generalized relativistic energy approach (Gell-Mann and Low S-matrix formalism). The zeroth approximation of the relativistic perturbation theory is provided by the optimized DiracFock and Dirac-Kohn-Sham ones. Optimization has been fulfilled by means of introduction of the parameter to the Fock and Kohn-Sham exchange potentials and further minimization of the gauge-non-invariant contributions into radiation width of atomic levels with using relativistic orbital bases, generated by the corresponding zeroth approximation Hamiltonians. The accurate theoretical results on the autoionization 4f13[ 2 F7/2]6s2 np[5/2]2 , 4f13 [2 F7/2] 6s2 nf[5/2]2 resonances energies and widths are presented and compared with experimental data, obtained on the basis of the laser polarization spectroscopy method.
Source: Photoelectronics
Language: English
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2908511348