New shape minimum in {sup 160}Yb: Evidence for a triaxial, strongly deformed band

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.021302· OSTI ID:21068100

Aguilar, A; Campbell, D B; Chandler, K; Pipidis, A; Riley, M A; Teal, C ^[1]; Simpson, J ^[2]; Hartley, D J ^[3]; Kondev, F G ^[4]; Clark, R M; Cromaz, M; Fallon, P; Lee, I Y; Macchiavelli, A O ^[5]; Ragnarsson, I ^[6]

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1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
2. STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD (United Kingdom)
3. Department of Physics, U.S. Naval Academy, Annapolis, Maryland 21402 (United States)
4. Nuclear Engineering Division and Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
5. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
6. Department of Mathematical Physics, Lund Institute of Technology, P. O. Box 118, S-22100 Lund (Sweden)

A high-spin rotational band was observed in the N=90 nucleus {sup 160}Yb with moment of inertia and decay characteristics very similar to recently discovered sequences in {sup 157,158}Er. These latter structures were discussed in terms of strongly deformed triaxial bands. Detailed cranked Nilsson-Strutinsky calculations were performed that predict that well-deformed triaxial structures are also expected at high spin in {sup 160}Yb. Within this interpretation the observed discontinuity in the dynamic moment of inertia around ({Dirac_h}/2{pi}){omega}=0.40-0.45 MeV can be explained as a crossing between i{sub 13/2} neutron levels.

• OSTI ID: 21068100
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 77; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CRANKING MODEL
ERBIUM 157
ERBIUM 158
MEV RANGE
MOMENT OF INERTIA
NEUTRONS
NUCLEAR DECAY
NUCLEAR STRUCTURE
ROTATIONAL STATES
SPIN
YTTERBIUM 160