Evidence for second-phonon nuclear wobbling

D.R. Jensen, G.B. Hagemann, I. Hamamoto, S.W. Ødegård, B. Herskind, G. Sletten, J.N. Wilson, K.M. Spohr, H. Hübel, P. Bringel, A. Neusser, G. Schönwasser, A.K. Singh, W.C. Ma, H. Amro, A. Bracco, S. Leoni, G. Benzoni, A. Maj, C.M. PetracheG. Lo Bianco, P. Bednarczyk, D. Curien

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Abstract

The nucleus 163Lu has been populated through the reaction 139La(29Si,5n) with a beam energy of 157 MeV. Three triaxial, strongly deformed (TSD) bands have been observed with very similar rotational properties. The first excited TSD band has earlier been assigned as a one-phonon wobbling excitation built on the lowest-lying (yrast) TSD band. The large B(E2)out/B(E2)in value obtainable for one of four observed transitions between the second and first excited TSD bands is in good agreement with particle-rotor calculations for a two-phonon wobbling excitation.
Original languageEnglish
Article number142503
JournalPhysical Review Letters
Volume89
Issue number14
DOIs
Publication statusPublished - 16 Sep 2002

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