Return of Collective Rotation in {sup 157}Er and {sup 158}Er at Ultrahigh Spin

Journal Article · Fri Jan 05 04:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.012501· OSTI ID:20861577

Paul, E S; Twin, P J; Evans, A O; Choy, P T. W.; Nolan, P J ^[1]; Pipidis, A; Riley, M A; Campbell, D B ^[2]; Simpson, J; Appelbe, D E; Joss, D T ^[3]; Clark, R M; Cromaz, M; Fallon, P; Goergen, A; Lee, I Y; Macchiavelli, A O; Ward, D ^[4]; Ragnarsson, I ^[5]

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1. Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom)
2. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
3. CCLRC Daresbury Laboratory, Daresbury, Warrington WA4 4AD (United Kingdom)
4. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
5. Department of Mathematical Physics, Lund Institute of Technology, P.O. Box 118, S-22100 Lund (Sweden)

A new frontier of discrete-line {gamma}-ray spectroscopy at ultrahigh spin has been opened in the rare-earth nuclei {sup 157,158}Er. Four rotational structures, displaying high moments of inertia, have been identified, which extend up to spin {approx}65({Dirac_h}/2{pi}) and bypass the band-terminating states in these nuclei which occur at {approx}45({Dirac_h}/2{pi}). Cranked Nilsson-Strutinsky calculations suggest that these structures arise from well-deformed triaxial configurations that lie in a valley of favored shell energy which also includes the triaxial strongly deformed bands in {sup 161-167}Lu.

• OSTI ID: 20861577
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 98; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DEFORMED NUCLEI
ERBIUM 157
ERBIUM 158
GAMMA SPECTROSCOPY
LUTETIUM 161
LUTETIUM 162
LUTETIUM 163
LUTETIUM 164
LUTETIUM 165
LUTETIUM 166
LUTETIUM 167
MOMENT OF INERTIA
SPIN