Freiburg 1999 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 32: Postersitzung / Kernphysik

HK 32.21: Poster

Wednesday, March 24, 1999, 10:15–12:00, Foyer

Search for excited states in the odd-odd N=Z nucleus ⁷⁰Br ^* — •C. Borcan¹, F. Dönau¹, R. Schwengner¹, H. Schnare¹, L. Käubler¹, S. Skoda², J. Eberth², T. Steinhardt², H. Grawe³, T. Härtlein⁴, F. Köck⁴, D. Pansegrau⁴, D. Schwalm⁴, M. Moszynski⁵, D. Wolski⁵, M. Weiszflog⁶, A. Axelsson⁶, D.R. Napoli⁷, A. Gadea⁷, and R. Wadsworth⁸ — ¹FZ Rossendorf — ²IKP, Uni Köln — ³GSI Darmstadt — ⁴MPI Heidelberg — ⁵Soltan Institute for Nuclear Studies, Swierk, Poland — ⁶Uni Uppsala, Sweden — ⁷INFN, Legnaro, Italy — ⁸Uni York, United Kingdom

A very challenging task in nuclear structure physics is the study of the nuclei at the N=Z line. The investigation of odd-odd N=Z nuclei should give an insight into the role of the T=0 and T=1 pairing interaction and especially into the dependence of its strength on excitation energy, angular momentum and deformation.
In the N=Z=35 nucleus ⁷⁰Br no excited states are known so far. To search for excited states in this nucleus we have performed an experiment at the MP Tandem accelerator of the MPI Heidelberg using the ⁵⁸Ni(¹⁶O,p3n) reaction at 95 MeV beam energy. The target consisted of a 5 mg/cm² thick ⁵⁸Ni foil. Coincidences of γ rays, neutrons and charged particles have been measured using the Rossendorf EUROBALL Cluster detector, 3 individual HPGe detectors, the particle detector ball RoSiB with 40 Si detectors and a reduced version of the EUROBALL neutron wall including 20 liquid scintillators.
Experimental techniques which provide the channel selectivity will be discussed and preliminary results will be presented.
^*Supported by the BMBF under the contracts 06 DR 827 and 06 OK 862 I.