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Prog. Theor. Phys. Vol. 123 No. 1 (2010) pp. 129-155

[ Full Text PDF : FREE ACCESS (2367K) ]

A Model Analysis of Triaxial Deformation Dynamics in Oblate-Prolate Shape Coexistence Phenomena

Koichi Sato,1,2 Nobuo Hinohara,2 Takashi Nakatsukasa,2 Masayuki Matsuo3 and Kenichi Matsuyanagi2,4

1Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
2Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center, Wako 351-0198, Japan
3Department of Physics, Niigata University, Niigata 950-2181, Japan
4Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan

(Received September 8, 2009; Revised November 18, 2009)

Abstract:

From the viewpoint of oblate-prolate symmetry and its breaking, we adopt the quadrupole collective Hamiltonian to study the dynamics of triaxial deformation in shape coexistence phenomena. It accommodates the axially symmetric rotor model, the γ-unstable model, the rigid triaxial rotor model, and an ideal situation for the oblate-prolate shape coexistence as particular cases. Numerical solutions of this model yield a number of interesting suggestions. (1) The relative energy of the excited 0+ state can be a signature of the potential shape along the γ direction. (2) Specific E2 transition probabilities are sensitive to the breaking of the oblate-prolate symmetry. (3) Nuclear rotation may induce the localization of collective wave functions in the (β,γ) deformation space.

Subject Index : 211
URL : http://ptp.ipap.jp/link?PTP/123/129/
DOI : 10.1143/PTP.123.129

[ Full Text PDF : FREE ACCESS (2367K) ] Citation:

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