Berlin 2001 – wissenschaftliches Programm

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A: Atomphysik

A 17: Posters Friday (Spectroscopy)

A 17.53: Poster

Freitag, 6. April 2001, 12:30–15:00, AT3

ACCURATE QED PERTURBATION THEORY CALCULATION OF THE HEAVY AND SUPER HEAVY ELEMENTS ATOMS AND IONS — •Alexander Glushkov and Larisa Vitavetskaya — Atom.-Nucl.-Mol. Spectr. Centre and Inst. Appl. Math. OHMI, P.O. Box 108, Odessa-9, 65009, Ukraine

A consistent theoretical approach, based on the quantum electrodynamics perturbation theory, is developed for a investigation of the spectroscopic characteristics for heavy and super heavy atomic systems, multi charged and negative ions. Zeroth approximation is generated by the effective ab initio model functional, constructed on the basis of the comprehensive gauge invariance procedure. The potential in Dirac equation includes the core ab initio potential, electric, polarization potentials of a spherically symmetric nucleus the gaussian form of charge distribution in the nucleus. There have taken into account all correlation corrections of the second order and dominated classes of the higher orders diagrams (electrons screening, particle-hole interaction, mass operator iterations). The magnetic inter-electron interaction is accounted in the lowest (on α² parameter), the Lamb shift polarization part - in the Uling-Serber approximation, self-energy part of the Lamb shift is accounted effectively with the use of the exact calculation for H-like ions with point nucleus. The nuclear size effect is accounted in the electric and polarization potentials. We carried out calculations of the 1s(2)2lj,3lj,4lj energy levels for Li-like ions in interval of nuclear charge 20-100 and the energy spectra of the super heavy elements atoms with Z=110,112,114.