Lifetime measurements of normal deformed states in {sub 71}{sup 165}Lu

Journal Article · Sat Jan 01 04:00:00 EST 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.71.014312· OSTI ID:20695875

Andgren, K ^[1]; Podolyak, Zs; Gelletly, W; Walker, P M; Wheldon, C ^[1]; Dewald, A; Fitzler, A; Moeller, O; Pissulla, T ^[2]; Xu, F R ^[3]; Algora, A ^[4]; Axiotis, M; Angelis, G de; Farnea, E; Gadea, A; Marginean, N; Martinez, T; Rusu, C ^[5]; Bazzacco, D; Lunardi, S ^[6]

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1. Department of Physics, University of Surrey, Guildford GU2 7XH (United Kingdom)
2. Institut fuer Kernphysik, Universitaet zu Koeln, Zuelpicher Str. 77, D-50937 Cologne (Germany)
3. School of Physics, Peking University, Beijing (China)
4. IFIC, Valencia (Spain)
5. I.N.F.N., Laboratori Nazionali di Legnaro, Legnaro (Italy)
6. Dipartimento di Fisica and I.N.F.N., Sezione di Padova, Padova (Italy); and others

Picosecond lifetimes of medium spin states in {sup 165}Lu were measured for the first time. The reaction used to populate the nucleus of interest was {sup 139}La({sup 30}Si,4n){sup 165}Lu at a beam energy of 135 MeV. The beam was provided by the XTU-tandem accelerator of Laboratori Nazionali di Legnaro, Italy. By using the differential decay curve method, lifetimes of 19 states in four different rotational bands were obtained. Therefrom the B(E2) values and the transitional quadrupole moments were deduced. The obtained Q{sub t} for the different bands are compared with total Routhian surface (TRS) calculations and particle-rotor-model calculations. The TRS calculations predict different axial symmetric shapes for the bands built on the 9/2{sup -}[514], 9/2{sup +}[404], and 1/2{sup -}[541] configurations, with a {gamma} softness for the 9/2{sup -}[514] configuration. This band has also been studied using the particle-rotor model, the results of which, however, are consistent with a triaxial shape with a {gamma} value of -15 degrees.

• OSTI ID: 20695875
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 71; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DEFORMED NUCLEI
E2-TRANSITIONS
LIFETIME
LUTETIUM 165
MEV RANGE
NUCLEAR DECAY
PARTICLE-CORE COUPLING MODEL
PROBABILITY
QUADRUPOLE MOMENTS
ROTATIONAL STATES
SPIN
TANDEM ELECTROSTATIC ACCELERATORS