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HK: Physik der Hadronen und Kerne

HK 10: Poster Session: Nuclear Structure/Spectroscopy

HK 10.3: Poster

Dienstag, 9. März 2004, 13:30–15:30, Foyer

High spin states in the odd-even nucleus ⁶⁹As — •I. Stefanescu¹, J. Eberth¹, I. Ragnarsson², G. Carlsson², G. Gersch¹, T. Steinhardt¹, O. Thelen¹, N. Warr¹, and D. Weisshaar¹ — ¹Institute for Nuclear Physics, University of Cologne, Zülpicherstr. 77, D-50937 Cologne, Germany — ²Department of Mathematical Physics, Lund Institute of Technology, PO Box 118, S-22100, Lund, Sweden

Excited states in ⁶⁹As have been studied using the ⁴⁰Ca(³²S,3p)⁶⁹As reaction at 95 and 105 MeV beam energy delivered by the VIVITRON accelerator of the IReS Strasbourg. Gamma rays have been detected with the EUROBALL spectrometer operated in conjunction with the Neutron WALL and the charged-particle detector EUCLIDES. New level sequences with positive and negative parity have been identified from γγ and γγγ coincidences. Spins and parities were deduced, whenever possible, from the analysis of the DCO ratios and from a comparison with the systematics.

The results are interpreted in the framework of the configuration-dependent cranked Nilsson-Strutinsky approach [1].

[1] A. Afanasjev et al., Phys. Rep., 322, 1(1999).