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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 Brentano² — ¹Institut 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.