(gamma)-ray spectroscopy of 163Ta
2009 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 80, no 5, 054316- p.Article in journal (Refereed) Published
Excited states in Ta-163 have been identified for the first time using the Cd-106(Ni-60,3p) fusion evaporation reaction. gamma rays were detected using the JUROGAM gamma-ray spectrometer and recoil discrimination was achieved using the recoil ion transport unit (RITU) gas-filled separator in conjunction with the GREAT spectrometer situated at the focal plane of the RITU. The yrast states are assigned to a strongly coupled rotational band based on a pi h(11/2) configuration. This structure exhibits large signature splitting at low spins that disappears after the paired band crossing because of the alignment of a pair of i(13/2) neutrons. This effect is ascribed to triaxial shape changes induced by the core-polarizing properties of the deformation-aligned h(11/2) proton and the rotation-aligned i(13/2) neutrons. Two additional strongly coupled band structures have been established and are discussed in terms of octupole-vibrational and two-quasiparticle excitations built on the yrast structure. The experimental results are compared with predictions from cranked-shell-model and total-Routhian-surface calculations.
Place, publisher, year, edition, pages
2009. Vol. 80, no 5, 054316- p.
IdentifiersURN: urn:nbn:se:kth:diva-10555DOI: 10.1103/PhysRevC.80.054316ISI: 000272313000030ScopusID: 2-s2.0-71049180361OAI: oai:DiVA.org:kth-10555DiVA: diva2:219102
FunderEU, European Research Council, HPRI-CT-1999-00044Swedish Research Council
gamma-ray spectroscopy of Ta-163
QC 201103232009-05-262009-05-262011-03-23Bibliographically approved