Search for the Exotic Wobbling Mode in $^{171}$Re

ORAL

Abstract

The observation of a wobbling band is a strong indication that a nucleus possesses triaxial deformation. The wobbling mode has been found in the $Z\approx 72$, $N\approx 94$ region in five Lu isotopes and in $^{167}$Ta and is associated with the $i_{13/2}$ band. In order to determine the role of the proton Fermi surface, an experiment was conducted to search for the wobbling mode in $^{171}$Re. High-spin states in $^{171}$Re were produced in the $^{120}$Sn($^{55}$Mn, $4n$) reaction and the gamma rays were detected with Gammasphere. Several bands have been found to feed into the $i_{13/2}$ structure, and their characteristics will be assessed to determine if these sequences are associated with wobbling. The implications of this result on the region of triaxiality will be discussed.

*Supported by the NSF (PHY-0854815), NSF (PHY-0758100), and DOE (DE-AC02-06CH11357).

Authors

  • E.E. Pedicini

  • D.J. Hartley

  • J.R. Vanhoy

    • US Naval Academy
  • M.A. Riley

  • X. Wang

    • Florida State University
  • R.V.F. Janssens

  • P.F. Bertone

  • M.P. Carpenter

  • C.J. Chiara

  • G. G\"{u}rdal

  • F.G. Kondev

  • T. Lauritsen

  • E.A. McCutchan

  • S. Zhu

    • Argonne National Lab
  • L.L. Riedinger

    • University of Tennessee
  • A.D. Ayangeakaa

  • U. Garg

  • J.T. Matta

    • University of Notre Dame
  • W. Ma

  • S. Mukhopadhyay

    • Mississippi State University
  • P. Chowdhury

  • S. Hota

    • University of Massachusetts-Lowell