Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 22: Postersitzung
HK 22.17: Poster
Montag, 7. März 2005, 16:30–18:00, TU MA141
ANGULAR CORRELATIONS OF THE DECAY CHANNELS OF 56Ni* FORMED IN THE 24Mg + 32S REACTION — •G. Efimov1,2,3, W. von Oertzen1,2, G. Gebauer2, S. Thummerer2, Tz. Kokalova1,2, C. Wheldon1, Ch. Schulz2, H.G. Bohlen2, D.R. Napoli4, S.M. Lenzi5, C. Beck6, M. Rousseau6, P. Papka6, and D. Kamanin3 — 1Freie Universität, Berlin, Germany — 2SF7, Hahn-Meitner-Institut Berlin, Germany — 3Joint Institute for Nuclear Research, JINR, Dubna, Russia — 4INFN-Laboratori Nazionali di Legnaro, Legnaro, Italy — 5Dipartimento di Fisica and INFN, Padova, Italy — 6Institut de Recherches Subatomiques, Strasbourg, France
Using the Binary Reaction Spectrometer (BRS) together with the EUROBALL array of Ge detectors the coplanarity of events with two heavy fragments in the decay channels of the reaction 32S + 24Mg → 56Ni at an energy of EL = 163.5 MeV has been reconstructed. For the correlated detection of two heavy ejectiles, the BRS combines 2 large-area gas detector telescopes in a kinematic coincidence set-up.
Extremely narrow out-of-plane angular correlations are observed not only in the case of binary decays with no charge loss, but also for the events with missing charges of 4 and 6. This observation can be interpreted as due to ternary fission processes, proceeding through elongated shapes of the hyper deformed compound nucleus.