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HK: Fachverband Physik der Hadronen und Kerne

HK 26: Physik mit schweren Ionen

HK 26.4: Vortrag

Mittwoch, 14. März 2007, 12:00–12:15, F

New Experimental Approach for Isochronous Mass Measurements at the FRS-ESR Facility — •Ronja Knöbel^1,2, Hans Geissel^1,2, Sergey Litvinov^1,2, Yuri Litvinov^1,2, Baohua Sun^1,3, Karl Beckert¹, Peter Beller¹, Fritz Bosch¹, David Boutin^1,2, Carsten Brandau¹, Lixin Chen^1,2, Christina Dimopoulou¹, Benjamin Fabian², Marc Hausmann⁴, Otto Klepper¹, Christophor Kozhuharov¹, Jan Kurcewicz¹, Marco Mazzocco¹, Fernando Montes¹, Gottfried Münzenberg¹, Agatino Musumarra⁵, Chiara Nociforo¹, Fritz Nolden¹, Wolfgang Plaß², Christoph Scheidenberger^1,2, Markus Steck¹, Helmut Weick¹, Nicolas Winckler^1,2, and Martin Winkler¹ — ¹GSI, Darmstadt,Germany — ²II. Physikalisches Institut,Justus-Liebig-Universität, Gießen, Germany — ³Peking University, Beijing,China — ⁴Michigan State University, East Lansing,USA — ⁵INFN-LNS Catania, Italy

At GSI the combination of the fragment separator FRS and the cooler-storage ring ESR is used to perform high accuracy mass and lifetime measurements of exotic nuclei. Operating the ESR in the isochronous mode allows measurements of the masses of exotic nuclei with half-lives down to several ten microseconds. By additional determination of the magnetic rigidity at the dispersive midplane of the FRS the mass resolving power could be significantly improved. A recently performed experiment with neutron-rich fission fragments will give access to new masses and therefore important information for investigations in nuclear structure and astrophysics.