First evidence for the wobbling mode in a triaxial superdeformed odd-A nucleus

I. Hamamoto, S.W. Ødegård, G.B. Hagemann, D.R. Jensen, M. Bergström, B. Herskind, G. Sletten, S. Tormänen, J.N. Wilson, P.O. Tjøm, K.M. Spohr, H. Hübel, A. Görgen, G. Schönwasser, A. Bracco, S. Leoni, A. Maj, C.M. Petrache, P. Bednarczyk, D. Curien

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Abstract

The wobbling mode is uniquely related to rotation of a triaxial body. The LuHf isotopes with N 94 provides a possible region of nuclei with pronounced triaxiality. We have investigated 163Lu through the fusion-evaporation reaction 139La(29Si,5n)163Lu with a beam energy of 152 MeV. The eletromagnetic properties of several connecting transitions between two presumably Triaxial, SuperDeformed (TSD) bands have been studied. New particle-rotor calculations in which an aligned i13=2 proton is coupled to a "wobbling" core are presented and evidence for the assignment of the excited TSD band as a wobbling mode built on the yrast TSD band in 163Lu is given.
Original languageEnglish
Pages (from-to)2545-2558
Number of pages15
JournalActa Physica Polonica B
Volume32
Issue number9
Publication statusPublished - Sep 2001

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Hamamoto, I., Ødegård, S. W., Hagemann, G. B., Jensen, D. R., Bergström, M., Herskind, B., Sletten, G., Tormänen, S., Wilson, J. N., Tjøm, P. O., Spohr, K. M., Hübel, H., Görgen, A., Schönwasser, G., Bracco, A., Leoni, S., Maj, A., Petrache, C. M., Bednarczyk, P., & Curien, D. (2001). First evidence for the wobbling mode in a triaxial superdeformed odd-A nucleus. Acta Physica Polonica B, 32(9), 2545-2558. http://www.actaphys.uj.edu.pl/fulltext?series=Reg&vol=32&page=2545