Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 10: Poster Session: Nuclear Structure/Spectroscopy
HK 10.7: Poster
Dienstag, 9. März 2004, 13:30–15:30, Foyer
Wobbling Excitation in Triaxial 161Lu* — •P. Bringel1, A. Al-khatib1, A. Bürger1, H. Hübel1, N. Nenoff1, A. Neusser1, G. Schönwasser1, A.K. Singh1, G.B. Hagemann2, B. Herskind2, D.R. Jensen2, G. Sletten2, D.T. Joss3, J. Simpson3, P. Bednarczyk4, D. Curien4, G. Gangopadhyay5, Th. Kröll6, G. Lo Bianco7, C. Petrache7, S. Lunardi8, W.C. Ma9, and N. Singh10 — 1HISKP, Univ. Bonn, Germany — 2NBI, Copenhage, Denmark — 3Daresbury Lab., Daresbury, UK — 4IReS, Strasbourg, France — 5Dep. of Physics, Kolkata Univ., India — 6INFN, LNL, Legnaro, Italy — 7Dipart. di Fisica, Univ. di Camerino, Italy — 8Dipart. di Fisica, Univ. di Padova, Italy — 9Dep. of Physics, Mississippi State University, USA — 10Dep. of Physics, Panjab University, India
In several Lu and Hf isotopes rotational bands with large deformation have been observed in recent years for which theory predicts a pronounced stable triaxiality (γ≈±20∘). The triaxial shape has been confirmed by the observation of the ’Wobbling Mode’ [1] which is a unique fingerprint. High-spin states in 161Lu have been populated in the reaction 139La(28Si,6n) at the Vivitron tandem accelerator at IReS, Strasbourg. Gamma-ray coincidences were measured with the EUROBALL spectrometer array. The analysis revealed two bands with very similar properties which are linked by enhanced E2 transitions. This pattern is characteristic for wobbling excitations.
[1] D.R. Jensen et al., Phys. Rev. Lett. 89, 142503 (2002). * supported by BMBF and EU