EPJ Web of Conferences (Dec 2013)

Spin-parity assignments and extension of the 02+ band in 158Er

  • Dinoko T S,
  • Orce J N,
  • Sharpey-Schafer J F,
  • Wiedeking M,
  • Bark R A,
  • Bvumbi S P,
  • Jones P,
  • Khaleel E A M A,
  • Lawrie E A,
  • Lawrie J J,
  • Majola S N T,
  • Masiteng P L,
  • Mohammed H,
  • Ntshangase S S,
  • Papka P,
  • Shirinda O,
  • Stankiewicz M,
  • Zhou E N

DOI
https://doi.org/10.1051/epjconf/20136301005
Journal volume & issue
Vol. 63
p. 01005

Abstract

Read online

Low and medium spin collective structures in 158Er have been studied using the 150Sm(12C,4nγγ) fusion-evaporation reaction at a beam energy of Elab = 65 MeV. A band built on the 02+ excitation has been established and extended to Jπ = 18+ from the analysis of γ-γ coincidence relationships, intensity arguments and DCO ratios. The 02+ band in 158Er presents a similar trend to the 02+ bands in the lighter N = 90 isotones but lies about 125 keV higher. This systematic trend supports a similar configuration for the 02+ bands in the N = 90 isotones.