Question of dynamic chirality in nuclei: The case of {sup 134}Pr

Journal Article · Mon Oct 15 00:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.044313· OSTI ID:21067798

Tonev, D ^[1]; De Angelis, G; Della Vedova, F; Gadea, A; Marginean, N; Napoli, D R; Orlandi, R; Sahin, E; Dobon, J Valiente ^[1]; Brant, S ^[2]; Frauendorf, S ^[3]; Petkov, P ^[4]; Dewald, A; Pejovic, P; Fitzler, A; Moeller, O; Zell, K O ^[5]; Doenau, F ^[6]; Balabanski, D L ^[4]; Zhong, Q ^[7]

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1. INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Italy)
2. Department of Physics, Faculty of Science, University of Zagreb, 10000 Zagreb (Croatia)
3. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
4. Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 1784 Sofia (Bulgaria)
5. Institut fuer Kernphysik der Universitaet zu Koeln, D-50937 Koeln (Germany)
6. Institute for Radiation Physics, Research Center Rossendorf, D-01314 Dresden (Germany)
7. Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413 (China)

Lifetimes of exited states in {sup 134}Pr were measured by means of the recoil distance Doppler-shift and Doppler-shift attenuation techniques. The branching ratios and the electric or magnetic character of the transitions were also investigated. The experiments were performed at IReS, Strasbourg, using the EUROBALL IV spectrometer, in conjunction with the inner bismuth germanate ball and the Cologne coincidence plunger apparatus. Exited states in {sup 134}Pr were populated in the fusion-evaporation reaction {sup 119}Sn({sup 19}F, 4n){sup 134}Pr. The possible chiral interpretation of twin bands was investigated in the two-quasiparticle triaxial rotor and interacting boson-fermion-fermion models. The analysis of the wave functions has shown that the possibility for the angular momenta of the proton, neutron, and core to find themselves in the favorable, almost orthogonal geometry, is present but is far from being dominant. The structure is characterized by large {beta} and {gamma} fluctuations. The existence of doublets of bands in {sup 134}Pr can be attributed to weak chirality dominated by shape fluctuations.

• OSTI ID: 21067798
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 76, Issue 4; Other Information: DOI: 10.1103/PhysRevC.76.044313; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BRANCHING RATIO
CHIRALITY
DSA METHOD
FLUCTUATIONS
FLUORINE 19 REACTIONS
INTERACTING BOSON MODEL
LIFETIME
NEUTRONS
NUCLEAR STRUCTURE
PRASEODYMIUM 134
PROTONS
RECOILS
TIN 119 TARGET
WAVE FUNCTIONS