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HK: Physik der Hadronen und Kerne

HK 38: Kernphysik/Spektroskopie

HK 38.4: Vortrag

Mittwoch, 9. März 2005, 15:00–15:15, TU MA004

EUROBALL+BRS as a tool for uniquely identifying weakly populated structures in light nuclei. — •Carl Wheldon¹, Tzany Kokalova^1,2, Severin Thummerer¹, Burckhard Gebauer¹, Wolfram von Oertzen^1,2, Christian Schulz¹, Hans-Gerhard Bohlen¹, Giacomo de Angelis³, Enrico Farnea³, Daniel R. Napoli³, Silvia M. Lenzi⁴, Christian Beck⁵, Marc Rousseau⁵, and Paul Papka⁵ — ¹SF7, Hahn-Meitner-Institut, Glienicker Straße 100, D-14109 Berlin, Germany — ²Freie Universität Berlin, Germany — ³INFN-Laboratori Nazionali di Legnaro, Legnaro, Italy — ⁴Dipartimento di Fisica dell’Università and INFN, Sezione di Padova, Italy — ⁵Institut de Recherches Subatomiques, Strasbourg, France

In order to search for highly-deformed nuclear cluster states based on α-particle structures in light nuclei, A<28, a reaction mechanism is required that makes use of pre-clustered target and/or projectile nuclei. Furthermore, the parity doublet structures that characterise asymmetrically deformed states, need to be cleanly extracted from the multitude of competing reaction channels.

To this end, an experiment was performed using the Berlin-Binary-Reaction-Spectrometer (BRS) in conjunction with the EUROBALL array, which in this instance comprised 15 cluster and 26 clover detectors. The 90 MeV D.C. ¹⁸O beam was provided by the IReS, Strasburg Vivitron and incident on a thin, 98 µg cm⁻², ⁹Be target. The BRS enables the charge, Z, of both binary products to be uniquely determined, in addition to providing millimetre position and precise energy information.

The p−γ coincidence analysis method and results will be reported.