Delayed backbending in the pi h(9/2) band of Ir-187

Danchev M., Balabanski D. L., Yigitoglu I., Akkus B., Beausang C., Bostan M., ...More

PHYSICAL REVIEW C, vol.68, no.5, 2003 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 68 Issue: 5
  • Publication Date: 2003
  • Doi Number: 10.1103/physrevc.68.054307
  • Journal Name: PHYSICAL REVIEW C
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Istanbul University Affiliated: Yes


High-spin states of Ir-187 have been populated in the Yb-176(N-15,4n) reaction and measured with the YRAST Ball spectrometer. The pih(9/2) rotational band has been extended beyond the first alignment crossing, which was found at rotational frequency (h) over bar omega(c) approximate to0.39 MeV . Two different scenarios for describing this crossing are considered: the alignment of an h(9/2) proton or i(13/2) neutron pair and it is concluded that a proton band crossing is more likely. A systematic study of the rotational alignment crossings in the pih(9/2) bands in the N=104,106,108 isotopes of Ta-73,Re-75,Ir-77, and Au-79 is presented.