First identification of excited states in the N=Z nucleus 70Br

Borcan, Cristina; Schnare, Harald; Schwengner, Ronald; Kaeubler, Lutz; Ortlepp, Hans Georg; Doenau, Friedrich; Grawe, Hubert; Skoda, Siegrun; Eberth, Juergen; Haertlein, Thomas; Koeck, Frank; Pansegrau, Dirk; Schwalm, Dirk; Moszynski, Marek; Wolski, Darek; Weiszflog, Matthias; Axelsson, Anders; Napoli, Daniel; Gadea, Andres; Wadsworth, Robert; Andrejtscheff, Wenzeslav

First identification of excited states in the N=Z nucleus 70Br

Borcan, C.; Schnare, H.; Schwengner, R.; Kaeubler, L.; Ortlepp, H. G.; Doenau, F.; Grawe, H.; Skoda, S.; Eberth, J.; Haertlein, T.; Koeck, F.; Pansegrau, D.; Schwalm, D.; Moszynski, M.; Wolski, D.; Weiszflog, M.; Axelsson, A.; Napoli, D.; Gadea, A.; Wadsworth, R.; Andrejtscheff, W.

Excited states in the N=Z nucleus 70Br have been investigated using the reaction 58Ni(16O,1p3n). Gamma rays were detected with one EUROBALL CLUSTER detector and three single HPGe detectors. Charged particles and neutrons were registered with the Rossendorf silicon ball and six modules of the EUROBALL neutron wall, respectively. The identification of gamma transitions in 70Br is based on the analysis of gamma-gamma-proton-neutron coincidences. A level scheme of 70Br has been established for the first time. It shows a multiplet-like structure of probably isospin T = 0 while T = 1 isobaric analogue states are not observed.

Keywords: Nuclear structure; Gamma-ray and particle spectroscopy; N = Z nuclei; p-n interaction; T = 0 and T = 1 states

European Physical Journal A 5 (1999) 243-246

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