Octupole Deformation in Even-Even Rn-Th Nuclei

WU Zhe-Ying; XU Fu-Rong

Chinese Physics C> 2006, Vol. 30> Issue(S2) : 78-80

Octupole Deformation in Even-Even Rn-Th Nuclei

WU Zhe-Ying ^, ,
XU Fu-Rong

MOE Key Laboratory, School of Physics, Peking University, Beijing 100871, China2 Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China3 Center for Theoretical Nuclear Physics, National Laboratory for Heavy Ion Physics, Lanzhou 730000, China

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Abstract：
The ground-state properties and high-spin spectra of the light even-even Rn-Th nuclei have been systematically investigated using the cranking shell model in a multidimentional deformation space, including β₂, β₃, β₄ and β₅ degrees of freedom. Calculations reproduce well the experimental values of the moment of inertia. The investigation of the structures shows that, with increasing neutron number, the ground-state shapes of these nuclei evolve from nearly spherical(N≈130), through well-developed octupole (N≈136) to well-deformed quadrupole (N≥140) shapes. Cranking calculations display that the nuclei investigated are very octupole soft and will restore to reflection-symmetric shapes at high spin.

References

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WU Zhe-Ying and XU Fu-Rong. Octupole Deformation in Even-Even Rn-Th Nuclei[J]. Chinese Physics C, 2006, 30(S2): 78-80.

WU Zhe-Ying and XU Fu-Rong. Octupole Deformation in Even-Even Rn-Th Nuclei[J]. Chinese Physics C, 2006, 30(S2): 78-80. shu

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Received: 2006-10-13
Revised: 1900-01-01

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Octupole Deformation in Even-Even Rn-Th Nuclei

WU Zhe-Ying ^,
XU Fu-Rong

Corresponding author: WU Zhe-Ying,

MOE Key Laboratory, School of Physics, Peking University, Beijing 100871, China2 Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China3 Center for Theoretical Nuclear Physics, National Laboratory for Heavy Ion Physics, Lanzhou 730000, China

Received Date: 2006-10-13
Accepted Date: 1900-01-01
Available Online: 2006-01-03

Abstract: The ground-state properties and high-spin spectra of the light even-even Rn-Th nuclei have been systematically investigated using the cranking shell model in a multidimentional deformation space, including β₂, β₃, β₄ and β₅ degrees of freedom. Calculations reproduce well the experimental values of the moment of inertia. The investigation of the structures shows that, with increasing neutron number, the ground-state shapes of these nuclei evolve from nearly spherical(N≈130), through well-developed octupole (N≈136) to well-deformed quadrupole (N≥140) shapes. Cranking calculations display that the nuclei investigated are very octupole soft and will restore to reflection-symmetric shapes at high spin.