Coexistence of triaxial and prolate shapes in Ir-171
1999 (English)In: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 657, no 2, 113-133 p.Article in journal (Refereed) PublishedText
Excited states in Ir-171 have been observed for the first time. Gamma-rays were assigned to the nucleus by the recoil-decay tagging method, The ground-state band has a structure consistent with an h(11/2) proton coupled to a core of large triaxial deformation. At high spins, a bandcrossing occurs which is interpreted as a change in shape to a prolate deformation, Band-mixing calculations are performed for Ir171-175. These show that shape-coexistence between triaxial and prolate states in these nuclei follows the same systematics found in their Pt and Os neighbours. The systematics are also compared with deformations calculated for Ir171-179 using the code "Ultimate Cranker". Dipole bands were also observed, but tilted axis cranking calculations suggest that they are associated with a collective rotation.
Place, publisher, year, edition, pages
1999. Vol. 657, no 2, 113-133 p.
IdentifiersURN: urn:nbn:se:kth:diva-178606DOI: 10.1016/S0375-9474(99)00319-XISI: 000082897800001OAI: oai:DiVA.org:kth-178606DiVA: diva2:878452
NV 201601142015-12-092015-12-082016-01-14Bibliographically approved