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Bochum 1998 – wissenschaftliches Programm

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HK: Hadronen und Kerne

HK 6: Spectroscopy, Light Nuclei

HK 6.5: Gruppenbericht

Montag, 16. März 1998, 15:30–16:00, D

Spectroscopy of Light Exotic Nuclei Using Multi-Nucleon Transfer Reactions — •H.G. Bohlen1, A. Blazevic1, B. Gebauer1, S.M. Grimes2, R. Kalpakchieva3, A. Lepine-Szily4, T.N. Massey2, W. Mittig5, W. von Oertzen1, J.M. Oliveira4, F. Oliveira5, A.N. Ostrowski6, P. Roussel-Chomaz5, S. Thummerer1, and M. Wilpert11Hahn-Meitner-Institut, Berlin — 2Ohio Univ., Athens, USA — 3FLNR, JINR, Dubna, Russia — 4IFUSP-Univ.of Sao Paulo, Sao Paulo, Brazil — 5GANIL, Caen, France — 6Univ. of Edinburgh, Edinburgh, UK

Multi-nucleon transfer reactions have been used successfully to study neutron-rich isotopes in the light mass region between 7He and 16B. The neutron drip line could be reached through a reaction mechanism, where protons are removed from the target and neutrons are added. New results obtained at HMI are presented for 7He, 10Li and 10,11,12Be using 15N-induced transfer reactions at 16 AMeV. For 7He we observed for the first time excited states, i.e. the 1/2-resonance, which is of interest for the spin-orbit splitting in these light neutron-rich nuclei. The obtained spectroscopic results on 10Li are presented, and the structure and decay properties of 10Li- and 11Li-levels are discussed. The Be-isotopes have been investigated to study their cluster structure and high-lying states. The multi-nucleon transfer mechanism has also been applied to study the proton-rich isotope 11N, the mirror nucleus of 11Be. In this case the 12C(14N,15C)11N reaction has been used. This measurement has been performed at Ganil. The observed resonances are discussed and compared to results of other experiments.
supported by BMBF No. 06 OB 47204 and NATO grant No. 960375

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