Structure changes in {sup 160}Er from low to ultrahigh spin.
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 Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF); State of Florida; United Kingdom Science and Technology Facilities Council; Swedish Research Council (SRC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 1020668
- Report Number(s):
- ANL/PHY/JA-68783; TRN: US1103758
- Journal Information:
- Phys. Rev. C, Vol. 83, Issue 4 ; Apr. 12, 2011
- Country of Publication:
- United States
- Language:
- ENGLISH
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