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Coexistence of triaxial and prolate shapes in 171Ir

Bark, R A; Tormanen, S; Back, T.; Cederwall, B.; Odegard, S W; Cocks, J F C; Helariutta, K; Jones, Peter G; Julin, Rauno Juhani; Juutinen, S; Kankaanpaa, H; Kettunen, H; Kuwano, Michihiko; Leino, M; Muikku, M; Rahkila, P; Savelius, A; Bergstrom, M; Ingebretsen, F; Maj, A; Mattiuzzi, M; Muller, W J; Riedinger, L L; Tjom, P O


Excited states in 171Ir 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 h11/2 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 171-175Ir. These show that shape-coexistence between triaxial and prolate states in these...[Show more]

CollectionsANU Research Publications
Date published: 1999
Type: Journal article
Source: Nuclear Physics A


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