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Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 28: Spectroscopy: 70 ≤ A < 110

HK 28.4: Talk

Tuesday, March 17, 1998, 15:00–15:15, D

Particle Excitations in the N=49 Nuclei 88Y and 87Sr — •C. Borcan1, R. Schwengner1, H. Schnare1, L. K"aubler1, T. Servene1, M. Wilhelm2, A. Fitzler2, S. Kasemann2, E. Radermacher2, and P. von Brentano21Institut f"ur Kern und Hadronenphysik, FZ Rossendorf, 01314 Dresden — 2Institut f"ur Kernphysik, Universit"at zu K"oln, 50937 K"oln

High spin states of the nuclei 88Y and 87Sr have been studied via the reactions 80Se(11B,3n) and 80Se(11B,p3n), respectively. The coincidence experiment was carried out with a 45 MeV beam delivered by the FN Tandem accelerator of the University of Cologne. γ-γ coincidences were measured using the Cologne detector array OSIRIS CUBE.The level schemes have been extended up to an energy of E ≈ 8 MeV. Spins and multipole mixing ratios were derived from directional correlations of coincident gamma rays (DCO) . The structure of these nuclei is discussed and compared with neighbouring N=49 nuclei.

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