EPJ Web of Conferences (Jan 2018)

A study on the transition between seniority-type and collective excitations in 204Po and 206Po

  • Stoyanova Milena,
  • Rainovski Georgi,
  • Jolie Jan,
  • Pietralla Norbert,
  • Blazhev Andrey,
  • Djongolov Martin,
  • Esmaylzadeh Arwin,
  • Gerhard Lisa,
  • Gladnishki Kalin,
  • Karayonchev Vasil,
  • Keatings James,
  • Kern Ralph,
  • Kocheva Diana,
  • Kröll Thorsten,
  • Mashtakov Konstantin,
  • Möller Oliver,
  • Régis Jean-Marc,
  • Scheck Marcus,
  • Schomacker Kerstin,
  • Sinclair Jacqueline,
  • Sürder Chistian,
  • Werner Volker,
  • Wiederhold Johannes

DOI
https://doi.org/10.1051/epjconf/201819403002
Journal volume & issue
Vol. 194
p. 03002

Abstract

Read online

Low-lying yrast states in 204Po and 206Po have been investigated by the γ-γ fast timing technique with LaBr3(Ce) detectors. Excited states of these nuclei were populated in the 197Au(11B,4n) and the 198Pt(12C,4n) fusion-evaporation reactions, respectively, at the FN-Tandem Facility at the University of Cologne. The lifetimes of the 4+1 states in both nuclei were measured, along with an upper limit for the 2+1 state in 204Po. The preliminary results are discussed in the scope of the systematic behavior of the transition strengths between yrast states in polonium isotopes.