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Atomic physics with new facilities at GSI

Project information

Grant agreement ID: INTAS2006-1000012-8881

  • Start date

    1 February 2007

  • End date

    31 January 2009

Funded under:

IC-INTAS

  • Overall budget:

    € 57 600

  • EU contribution

    € 54 800

Coordinated by:

TECHNISCHE UNIVERSITÄT DRESDEN

Germany

Objective

The present proposal aims at implementing a strong collaboration between groups working on investigations of fundamental aspects of modern physics with highly charged ions and atoms. The teams will work on high-precision calculations of the g-factor of B-like lead in order to provide a theoretical basis for the most accurate determination of the fine-structure constant from the g-factor measurements. This will provide a unique opportunity for a high-precision determination of the fine-structure constant from QED at strong fields. The cross sections of the antiproton scattering by heavy ions at low energies will be evaluated. Special attention will be focused on the backward scattering, where a strong enhancement of the cross section due to the vacuum-polarization effect may occur. Schemes for the radiative polarization of ion beams at the storage ring will be worked out in details, including the investigation of depolarization processes. Polarized beams of the multicharged ions could make it feasible to search for electric dipole moments of beta-active nuclei and for nuclear anapole moments. The existing experimental data and the novel experiments proposed for highly charged ions require accurate QED calculations of the energy levels and transition rates. In particular, such calculations are necessary to determine precisely the level crossings in heavy ions. Such crossings are considered as most favorable situations for the search of parity-nonconservation effects and for the search of possible time variation of the fine-structure constant. Within this project it is planned to perform the accurate evaluation of the position and width of the energy levels near the crossing points using the QED Line Profile Approach developed earlier. Recent progress in the production of antihydrogen atoms makes the studies of interactions of these atoms with the ordinary atoms utterly important. The finding of the quasistable molecules with antihydrogen atom could initiate the future chemistry of the antihydrogen compounds with unusual properties (educe of high energy due to the annihilation processes etc). We plan to perform accurate calculations of properties of the hydrogen-antihydrogen quasimolecule including the case of the Rydberg states for the antihydrogen atom. The latter case corresponds to the recent experimental situation: the antihydrogen atom was observed up to now only in Rydberg states. We plan to employ the QED approach to establish the universal scaling laws for differential and total cross sections of ionization processes on inner-shell electrons. The study of the universal scalings will allow one to understand the very general features of ionization processes for different atomic targets as well as for wide energy domain. The investigation of nondipole, relativistic and QED effects beyond the universal scalings will be also performed.

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Coordinator

TECHNISCHE UNIVERSITÄT DRESDEN

Address

Mommsenstrasse, 13
Dresden

Germany

Participants (4)

GESELLSCHAFT FÜR SCHWERIONENFORSCHUNG (GSI)

Germany

ST.PETERSBURG NUCLEAR PHYSICS INSTITUTE

Russia

ST.PETERSBURG STATE UNIVERSITY

Russia

UNIVERSITÉ PIERRE ET MARIE CURIE PARIS VI

France

Project information

Grant agreement ID: INTAS2006-1000012-8881

  • Start date

    1 February 2007

  • End date

    31 January 2009

Funded under:

IC-INTAS

  • Overall budget:

    € 57 600

  • EU contribution

    € 54 800

Coordinated by:

TECHNISCHE UNIVERSITÄT DRESDEN

Germany