Structure changes in {sup 160}Er from low to ultrahigh spin.

Journal Article · Tue Apr 12 04:00:00 EDT 2011 · Phys. Rev. C

DOI:https://doi.org/10.1103/PhysRevC.83.044309· OSTI ID:1020668

Ollier, J; Simpson, J; Riley, M A; Paul, E S; Wang, X; Aguilar, A; Carpenter, M P; Darby, I G; Hartley, D J; Janssens, R V. F.; Kondev, F G; Lauritsen, T; Nolan, P J; Petri, M; Rees, J M; Rigby, S V; Teal, C; Thomson, J; Unsworth, C; Zhu, S ; Kardan, A; Ragnarsson, I ^[1]

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1. Nuclear Engineering Division

A spectroscopic investigation of the {gamma} decays from excited states in {sup 160}Er has been performed in order to study the changing structural properties exhibited from low spin up toward ultrahigh spin (I{approx}60{h_bar}). The nucleus {sup 160}Er was populated by the reaction {sup 116}Cd({sup 48}Ca,4n{gamma}) at a beam energy of 215 MeV, and resulting {gamma} decays were studied using the Gammasphere spectrometer. New rotational structures and extensions to existing bands were observed, revealing a diverse range of quasiparticle configurations, which are discussed in terms of the cranked shell model. At spins around 50{h_bar} 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.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; NSF; State of Florida; United Kingdom Science and Technology Facilities Council; Swedish Research Council
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1020668
• Report Number(s): ANL/PHY/JA-68783
• Journal Information: Phys. Rev. C, Journal Name: Phys. Rev. C Journal Issue: 4 ; Apr. 12, 2011 Vol. 83; ISSN 0556-2813
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EXCITED STATES
ROTATIONAL STATES
SHELL MODELS
SPIN