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HK: Physik der Hadronen und Kerne

HK 22: Postersitzung

HK 22.40: Poster

Montag, 7. März 2005, 16:30–18:00, TU MA141

Electron Scattering off Rare Isotopes — •Haik Simon — GSI Darmstadt, Germany

The planned international accelerator facility FAIR at Darmstadt [1,2] will provide intense high-quality ion beams. A new double synchrotron ring system will accelerate 10¹² ions/s up to uranium to an energy of 1.5 GeV/u. A system of storage-cooler rings will be used to reduce the emittance and energy spread of secondary beams created via fragmentation or fission reactions [3] in the Super-FRS.

Two intersecting electron and ion rings (eA collider [4]) will allow [5] to scatter electrons with an energy of 125-500 MeV off exotic nuclei. The eA collider will enable for the first time to perform elastic, inelastic and quasielastic electron scattering off shortlived radioactive isotopes. The collider kinematics has the advantage that it will be possible to detect electrons and target like ejectiles in coincidence. One of the most challenging aspects in this context is the design of a high-resolution electron spectrometer with large acceptance adapted to the specific demands of an in-ring experiment. Charge distributions, transition form factors in giant resonance or electrofission experiments and spectral functions can be measured with a clean electromagnetic probe. The future prospects and feasability of these sophisticated experiments will be shown.

[1] http://www.gsi.de/zukunftsprojekt/

[2] http://www.gsi.de/GSI-Future/cdr/

[3] H. Geissel et al., Nucl. Inst. Meth. B204(2003)71

[4] I.A Koop et al., BINP-GSI Report 2001

[5] L.V. Chulkov et al., Physica Scripta T104(2003)144