Quadrupole moment measurements for strongly deformed bands in {sup 171,172}Hf.

Journal Article · Wed Apr 13 04:00:00 EDT 2011 · Phys. Rev. C

DOI:https://doi.org/10.1103/PhysRevC.83.044311· OSTI ID:1020680

Mukhopadhyay, S; Ma, W C; Janssens, R V. F.; Carpenter, M P; Chiara, C J; Chowdhury, P; Cullen, D M; Hagemann, G B; Hartley, D J; Hota, S S; Ijaz, Q A; Khoo, T L; Kondev, F G; Lakshmi, S; Lauritsen, T; Marsh, J; Riedinger, L L; Toh, Y; Yadav, R B; Zhu, S ^[1]

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1. Nuclear Engineering Division

A lifetime experiment, using the Doppler-shift attenuation method, has been performed at Gammasphere to measure the transition quadrupole moments Q{sub t} of strongly deformed bands in {sup 171}Hf and {sup 172}Hf. The measured value of Q{sub t} {approx} 9.5 e b for the band labeled ED in {sup 171}Hf strongly supports the recent suggestion that this sequence and several structures with similar properties in neighboring Hf isotopes are associated with a near-prolate shape with a deformation enhanced relative to that of normal deformed structures. The measured values of Q{sub t} {approx} 14 e b for the bands labeled SD1 and SD3 in {sup 172}Hf confirm that these sequences are associated with a prolate superdeformed shape, a property inferred in earlier work from other measured characteristics of the bands. Similar bands in {sup 173-175}Hf are also likely to be associated with superdeformed shapes. The observations are in contrast to predictions of cranking calculations performed with the ultimate cranker code.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; NSF
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1020680
• Report Number(s): ANL/PHY/JA-69355
• Journal Information: Phys. Rev. C, Journal Name: Phys. Rev. C Journal Issue: 4 ; Apr. 13, 2011 Vol. 83; ISSN 0556-2813
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ATTENUATION
DATA
DEFORMATION
LIFETIME
QUADRUPOLE MOMENTS
SHAPE