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HK: Hadronen und Kerne

HK 56: Postersitzung

HK 56.62: Poster

Wednesday, March 18, 1998, 17:00–19:00, Foyer

Development of a fission fragment detector with large solid angle — •A. Kleinböhl¹, Th. W. Elze¹, J. Gerl², M. Kaspar², I. Kozhoukharov³, Th. Kröll⁴, I. Peter⁵, M. Rejmund², H. Schaffner², Ch. Schlegel², and H. J. Wollersheim² — ¹Universität Frankfurt am Main — ²GSI Darmstadt — ³LNL Legnaro, Italy — ⁴University of Padova, Italy — ⁵Freie Universität Berlin

The new fission fragment detector will be used for the γ-spectroscopy of neutron-rich nuclei produced by fission sources like ²⁵⁰Cf/²⁵²Cf. The detector enables one to gain information about both charge and mass of a fission fragment in coincidence with γ-rays emitted by this fragment and its corresponding partner and measured with a HPGe detector. This is achieved by a detector that combines a gas chamber to measure the energy loss, and a silicon surface-barrier detector or a solar cell to measure the total kinetic energy of the fragment. Preliminary experiments using a prototype detector with small solid angle as well as design studies for a detector with larger solid angle will be presented.