First identification of excited states in the N = Z nucleus $^{70}$Br

C. Borcan - et al.

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2018 Impact factor 2.481

Hadrons and Nuclei

Eur. Phys. J. A 5, 243-246

Short note

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

C. Borcan^1,2 - H. Schnare¹ - R. Schwengner¹ - L. Käubler¹ - H.G. Ortlepp¹ - F. Dönau¹ - H. Grawe³ - M. Górska³ - S. Skoda⁴ - J. Eberth⁴ - T. Härtlein⁵ - F. Köck⁵ - D. Pansegrau⁵ - M. Moszynski⁶ - D. Wolski⁶ - M. Weiszflog⁷ - A. Axelsson⁷ - D.R. Napoli⁸ - A. Gadea⁸ - R. Wadsworth⁹ - A. Wilson⁹ - W. Andrejtscheff¹⁰

¹ Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, D-01314 Dresden, Germany
² Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, P.O. Box MG-6, Romania
³ GSI Darmstadt, D-64229 Darmstadt, Germany
⁴ Institut für Kernphysik der Universität zu Köln, D-50937 Köln, Germany
⁵ Max-Planck-Institut für Kernphysik, D-69029 Heidelberg, Germany
⁶ Soltan Institute for Nuclear Studies, Department of Nuclear Electronics, PL-05-400 Otwock-Swierk, Poland
⁷ The Svedberg Laboratory, P.O. Box 533, S-75121 Uppsala, Sweden
⁸ INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
⁹ University of York, Physics Department, Heslington, York Y01 5DD, UK
¹⁰ Bulgarian Academy of Sciences, Institute of Nuclear Research and Nuclear Energy, BG-1784 Sofia, Bulgaria

Received: 13 April 1999 / Revised version: 28 April 1999 Communicated by D. Schwalm

Abstract
Excited states in the T_z = 0 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.