Question of dynamic chirality in nuclei: The case of ^134 Pr

Tonev, D. and Angelis, G. de and Brant, Slobodan and Frauendorf, S. and Petkov, P. and Dewald, A. and Dönau, F. and Balabanski, D. L. and Zhong, Q. and Pejovic, P. and Bazzacco, D. and Bednarczyk, P. and Camera, F. and Curien, D. and Vedova, F. Della and Fitzler, A. and Gadea, A. and Bianco, G. Lo and Lenzi, S. and Lunardi, S. and Marginean, N. and Moller, O. and Napoli, D. R. and Orlandi, R. and Sahin, E. and Saltarelli, A. and Dobon, J. Valiente and Zell, K. O. and Zhang, Jing-ye and Zhang, Y. H. (2007) Question of dynamic chirality in nuclei: The case of ^134 Pr. Physical Review C, 76 (4). pp. 44313-26. ISSN 0556-2813

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Lifetimes of exited states in ^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 BGO ball and the Cologne coincidence plunger apparatus. Exited states in ^134 Pr were populated in the fusion-evaporation reaction ^119 Sn ( ^19 F, 4n ) ^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 ^134 Pr can be attributed to weak chirality dominated by shape fluctuations.

Item Type: Article
Date: October 2007
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2007) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1010
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 24 May 2014 19:51
Last Modified: 24 May 2014 19:51

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