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HK: Fachverband Physik der Hadronen und Kerne
HK 49: Poster
HK 49.43: Poster
Thursday, March 15, 2007, 16:00–17:00, P
Isobar separation at FRS-ESR, a development study towards pure isomeric stored beams — •Christoph Scheidenberger1,2, Karl Beckert1, Peter Beller1, Fritz Bosch1, David Boutin2, Lixin Chen2, Bernhard Franzke1, Hans Geissel1,2, Ronja Knöbel1, Christophor Kozhuharov1, Sergei Litvinov1, Yuri Litvinov1, Gottfried Münzenberg1, Fritz Nolden1, Wolfgang Plaß2, Markus Steck1, Baohua Sun1, Helmut Weick1, and Martin Winkler1 — 1GSI, Planckstraße 1, D-64291 Darmstadt — 2II. Physikalisches Institut, Justus-Liebig-Universität, Heinrich-Buff-Ring 14-16,
It is one important goal of the ILIMA project at FAIR to study masses and decay properties of relativistic isomeric beams stored and cooled in the planned storage-ring complex. Coupled to the Super-FRS, which provides secondary beams of highest intensities, one expects to access the structure of exotic nuclei with new experimental opportunities (such as reactions with and scattering off internal targets) and also to discover new phenomena (such as neutron radioactivity from high-energy isomers in neutron-rich nuclei).
In favorable cases pure isomeric beams can be obtained. The present paper investigates possibilities, how such isomeric beams can be produced after projectile fragmentation and in-flight separation. First results from the spatial separation of crystalline secondary beams, delivered from the FRS and stored in the ESR, are shown, where a mass resolution of Δ m / m ≈ 2 · 10−5 is obtained.