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Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 10: Poster Session: Nuclear Structure/Spectroscopy

HK 10.30: Poster

Tuesday, March 9, 2004, 13:30–15:30, Foyer

Properties of pseudo-Nilsson bands in 185Os. — •C. Wheldon1,2,3, A.E. Stuchbery4, A.N. Wilson4, G.D. Dracoulis4, A.M. Bruce5, R.A. Bark4, A.P. Byrne4,6, F.M. Prados-Estevez5, G.J. Lane4, C.-B. Moon4,7, J.N. Orce5, and R. Wood11Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, UK. — 2Kernphysik II, Gesellschaft für Schwerionenforschung, Max-Planck-Straße 1, D-64291 Darmstadt, Germany. — 3Hahn-Meitner-Institut, Glienicker Straße 100, D-14109 Berlin, Germany — 4Department of Nuclear Physics, Research School of Physical Sciences and Engineering, The Australian National University, Canberra, ACT 0200, Australia. — 5School of Engineering, University of Brighton, Brighton BN2 4GJ, UK. — 6Joint appt. with Dept. of Physics, The Faculties, Australian National University, Canberra ACT 0200, Australia. — 7Department of Physics, Hoseo University, Chung-Nam 336-795, Republic of Korea.

The pseudo-spin symmetry is an approximate scheme for describing nuclear orbitals lying high in a given shell. However, the range of nuclei over which this approximation is physically reasonable remains unknown. New data will be presented for 185Os, following the 176Yb(13C,4n)185Os reaction, extending the pseudo-Nilsson 1/2,3/2[4 1 1] doublet structure and the 7/2[4 0 4] band to significantly higher spins. Gamma-ray branching-ratio data have been analysed to obtain extensive B(M1) and B(E2) intraband and interband transition ratios and the data are compared with particle-rotor calculations based on the pseudo-Nilsson potential and the Woods-Saxon potential. The completed analysis and results from this study will be presented.

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