Description of even-even triaxial Nuclei within the Coherent State and the Triaxial Rotation-Vibration Models

Abstract

The coherent state model (CSM) and the triaxial rotation-vibration model (TRVM) are alternatively used to describe the ground, gamma and beta bands of 228Th. CSM is also applied to the nuclei 126Xe and 130Ba, which were recently considered in TRVM. The two models are compared with respect to both their underlying assumptions and to their predicted results for energy levels and E2 branching ratios. Both models describe energies and quadrupole transitions of 228Th equally well and in good agreement with experiment, if the 0${}_3^{+}$ level at 1120 keV is interpreted as the head of the beta band. The other two 0${}^{+}$ levels at 832 and 939 keV are most likely not of a pure quadrupole vibration nature as has already been pointed out in the literature.

arXiv comment31 pages, RevTeX, 6 figures

References in corpus (1)

• The Triaxial Rotation Vibration Model in the Xe-Ba Region

Cited by in corpus (8)

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• Application of the sextic oscillator with centrifugal barrier and the spheroidal equation for some X(5) candidate nuclei
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• New features of the triaxial nuclei described with a coherent state model
• Analytical description of the Coherent State Model for near vibrational and well deformed nuclei
• Unified description of three positive and three negative parity interacting bands
• Remarcs on the shape transition from spherical to deformed gamma unstable nuclei
• Simultaneous description of four positive and four negative parity bands