Structure changes inEr160from low to ultrahigh spin

J. Ollier, J. Simpson, M.A. Riley, E.S. Paul, X. Wang, A. Aguilar, M.P. Carpenter, I.G. Darby, D.J. Hartley, R.V. F. Janssens, F.G. Kondev, T. Lauritsen (+10 others)
2011 Physical Review C  
A spectroscopic investigation of the γ decays from excited states in 160 Er has been performed in order to study the changing structural properties exhibited from low spin up towards ultrahigh spin (I ∼ 60h). The nucleus 160 Er was populated by the reaction 116 Cd( 48 Ca,4nγ) at a beam energy of 215 MeV and resulting γ decays were studied using the Gammasphere spectrometer. New rotational structures and extensions to existing bands were observed, revealing a diverse range of quasiparticle
more » ... urations, which are discussed in terms of the cranked shell model. At spins around 50h there is evidence for oblate states close to the yrast line. Three rotational bands that have the characteristics of strongly deformed triaxial structures are observed, marking a return to collectivity at even higher spin. The high spin data are interpreted within the framework of cranked Nilsson-Strutinsky calculations.
doi:10.1103/physrevc.83.044309 fatcat:ygccbiruq5hkjlkwde5tcapi44