NEW RELATIVISTIC MODEL POTENТIAL APPROACH TO SENSING RADIATIVE TRANSITIONS PROBABILITIES IN SPECTRA OF HEAVY RYDBERG ATOMIC SYSTEMS

Abstract

We have presented an effective relativistic approach for sensing and calculating energy of levels, probabilities and oscillator strengths (transition amplitudes, lifetimes) of a number of radiative transitions in the spectra of heavy Rydberg atoms of alkaline elements. It represents a new version of the relativistic model potential method. The approach is based on the relativistic many-body gauge-invariant perturbation theory with the improved Dirac-Kohn-Sham zeroth approximation and relativistic energy approach (S-matrix adiabatic Gell-Mann and Low formalism). We have shown that that during computing the energy and spectroscopic characteristics of the multielectron Rydberg atomic systems a new approach provides a precise accounting exchange-correlation effects, including effect of essentially non-Coulomb grouping of Rydberg levels, pressure continuum. There are received precise data on energy and spectroscopic parameters energy, radiation width, amplitude transitions, the lifetime) for Rydberg atoms Rb, Cs, Fr, particularly, transitions nS½→n’P½,3/2 (n=5,6; n’=10-70), nP½,3.2→n’D3/2,5/2 (n=5,6; n’=10-80) in the Rb, Cs spectra; for Rydberg Fr there are in most first calculated and predicted spectroscopic data on transition amplitude, lifetime of Rydberg states and transitions 7S½-nP½,3/2, 7P½,3.2-nD3/2,5/2 (n=20-80). Regarding the application of the obtained data it can be indicated on carrying out new types of radiative quantum sensors and frequency standards, quantum electronics and different quantum devices.