The present project aims at implementing a strong collaboration between groups working with atomic physics of heavy ions. The teams will investigate new effects in spectroscopic and collisional characteristics of heavy ions, including highly charged ions.
As concerns spectroscopic properties, the teams will work at performing high precision calculations of the g-factors of H- and Li-like ions. They will provide the most accurate test of the magnetic sector of quantum electrodynamics in a strong Coulomb field and will promote new determinations of the fine structure constant, nuclear magnetic moments, and the nuclear charge radii.
The parity non-conservation (PNC) effects in highly charged ions (HCI) will be investigated. These studies will allow for tests of the validity of the standard model of electro weak interactions in strong fields of the nuclei. The experimental investigations of PNC effects in HCI will be much simplified if the polarized ion beams will be available, which are needed for other purposes as well. The schemes for the radiative polarization of the ion beams at storage rings will be worked out in the project.
As for atomic collisions, multielectron ionization cross sections and probabilities in collisions of heavy ions with complex atoms are planned to be investigated. Evaluation of the scaling laws for the corresponding single- and multiple-electron cross sections as a function of the main atomic parameters (relative velocity, atomic structure of both colliding particles) will be performed. The double
K-shell ionisation of helium-like ions by a single photon will be investigated within the framework of the rigorous QED approach. The radiative recombination of an electron with a polarized ion via emission of a polarized photon is also to be studied. The role of the relativistic effects in this process for various scattering angles and polarizations will be investigated.
The theoretical background for new experimental investigations on polarization and target-orientation phenomena in interaction of fast highly-charged ions and antiprotons with matter will be given.
An approach shall be developed and applied for considering two-electron transitions in heavy helium-like ions colliding with neutral
atoms and bare nuclei at moderate relativisatic energies.
188350 Gatchina, St.petersburg