Spectroscopy of Hf161 from low to high spin

P. J. R. Mason et al.
Phys. Rev. C 90, 054331 – Published 21 November 2014

Abstract

Excited states in the neutron-deficient nucleus Hf8972161 have been populated using the Sn118(Ti48,5n)Hf161 and Pd110(Fe56,5n)Hf161 fusion-evaporation reactions at 240 and 270 MeV, respectively. The level scheme for Hf161 has been extended with the observation of new band structures and an Iπ=(13/2+) isomeric state with a half-life of 4.8(2) μs has been identified. The decay path from this isomer to the (7/2) ground state is established. The yrast band, based on the (13/2+) isomeric state, is extended up to (73/2+) and side band structures are identified up to (69/2) and (55/2). Quasiparticle assignments for these rotational structures are made on the basis of their alignment properties and Woods-Saxon cranked shell-model calculations.

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  • Received 26 September 2014

DOI:https://doi.org/10.1103/PhysRevC.90.054331

©2014 American Physical Society

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Vol. 90, Iss. 5 — November 2014

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