The triaxial rotation vibration model in the Xe_Ba region

Meyer, U.; Faessler, Amand; Khadkikar, S.B.

doi:10.1016/s0146-6410(97)00031-8

Progress in Particle and Nuclear Physics

1997

DOI: 10.1016/s0146-6410(97)00031-8

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The triaxial rotation vibration model in the Xe_Ba region

U. Meyer

Amand Faessler

S.B. Khadkikar

Abstract: Collective quadrupole degrees of freedom give rise to vibrations and rotations in nuclei. The axial Rotation Vibration Model (RVM) is here extended to describe also triaxial equilibrium shapes with β and γ vibrations allowing for the interaction between vibrations and rotations. This Triaxial Rotation Vibration Model (TRVM) is applied to Ba and Xe isotopes with A≈120 to 130. This area has recently been pointed out to be a region for the O(6) limit of the Interacting Boson Approximation (IBA). The present work … Show more

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Cited by 4 publications

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Low-spin states of odd-mass xenon isotopes

Yazar

2008

Pramana - J Phys

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In this work, we analyse the positive parity of states of odd-mass nucleus within the framework of interacting boson-fermion model. The result of an IBFM-1 multilevel calculation with the 2d 5/2 , 1g 7/2 , 3s 1/2 , 2d 3/2 and 1h 11/2 , single particle orbits is reported for the positive parity states of the odd-mass nucleus 125−129 Xe. Also, an IBM-1 calculation is presented for the low-lying states in the even-even 124−128 Xe core nucleus. The energy levels and B(E2) transition probabilities were calculated and compared with the experimental data. It was found that the calculated positive parity low-spin state energy spectra of the odd-mass 125−129 Xe isotopes agree quite well with the experimental data.

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Low-spin states of odd-mass xenon isotopes

Yazar

2008

Pramana - J Phys

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Description of even-even triaxial nuclei within the coherent state and the triaxial rotation-vibration models

1998

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The coherent state model (CSM) and the triaxial rotation-vibration model (TRVM) are alternatively used to describe the ground, γ and β bands of 228 Th. CSM is also applied to the nuclei 126 Xe and 130 Ba, 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 228 Th equally well and in good agreement with experiment, if the 0 + 3 level at 1120 keV is interpreted as the head of the β band. The other two 0 + levels at 832 and 939 keV are most likely not of a pure quadrupole vibration nature as has been already pointed out in the literature. PACS number(s): 21.60. Ev, 23.20.Js, 27.60.+j Typeset using REVT E X

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New features of the triaxial nuclei described with a coherent state model

Buganu¹,

Râduţâ

Faessler

2012

J. Phys. G: Nucl. Part. Phys.

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Supplementing the liquid drop model (LDM) Hamiltonian, written in the intrinsic reference frame, with a sextic oscillator plus a centrifugal term in the variable β and a potential in γ with a minimum in π 6 , the Schödinger equation is separated for the two variables which results in having a new description for the triaxial nuclei, called the sextic and Mathieu approach (SMA). The SMA is applied for two non-axial nuclei, 180 Hf and 182 W, and results are compared with those yielded by the coherent state model (CSM). The main result of this paper consists of the derivation of the equations characterizing SMA from a semi-classical treatment of the CSM Hamiltonian. In this manner, the potentials in β and γ variables, respectively, show up in a quite natural way which contrasts with their ad hoc choice when the SMA emerges from the LDM.

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The triaxial rotation vibration model in the Xe_Ba region

Cited by 4 publications

References 9 publications

Low-spin states of odd-mass xenon isotopes

Low-spin states of odd-mass xenon isotopes

Description of even-even triaxial nuclei within the coherent state and the triaxial rotation-vibration models

New features of the triaxial nuclei described with a coherent state model

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