EPJ Web of Conferences (Dec 2012)

A novel decay channel of the 1+ scissors mode: coupling to the vibrational β-excitation

  • Werner V.,
  • Savran D.,
  • Scheck M.,
  • Romig C.,
  • Pietralla N.,
  • Möller O.,
  • Kotila J.,
  • Fransen C.,
  • Beller J.,
  • Zilges A.,
  • Zweidinger M.

DOI
https://doi.org/10.1051/epjconf/20123810004
Journal volume & issue
Vol. 38
p. 10004

Abstract

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The transitional nucleus 154Gd was investigated using a combination of a photon scattering experiment and a γγ-coincidence study following the β decay of 154Tb. A novel decay channel from the scissors mode to the band head of the β-band was observed. Its transition strength B(M1; 1sc+ → 0β+) was determined. An IBM-2 calculation reveals a correlation of this decay channel and the shape phase transition between spherical and deformed nuclei.