Evidence for Second-Phonon Nuclear Wobbling

Sep 30, 2002
4 pages
Published in:
  • Phys.Rev.Lett. 89 (2002) 142503

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Abstract: (APS)
The nucleus L163u has been populated through the reaction L139a(S29i,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.
  • 27.70.+q
  • 21.10.Re
  • 23.20.En