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Nonaxial-octupole Y32 correlations in N = 150 isotones from multidimensional constrained covariant density functional theories

Abstracts

The non-axial reflection-asymmetric β32 shape in some transfermium nuclei with N = 150, namely 246Cm, 248Cf, 250Fm, and 252No are investigated with multidimensional constrained covariant den- sity functional theories. By using the density-dependent point coupling covariant density functional theory with the parameter set DD-PC1 in the particle-hole channel, it is found that, for the ground states of 248Cf and 250Fm, the non-axial octupole deformation parameter β32 > 0.03 and the energy gain due to the β32 distortion is larger than 300 keV. In 246Cm and 252No, shallow β32 minima are found. The occurrence of the non-axial octupole β32 correlations is mainly from a pair of neutron orbitals [734]9/2 (νj15/2) and [622]5/2 (νg9/2) which are close to the neutron Fermi surface and a pair of proton orbitals [521]3/2 (πf7/2) and [633]7/2 (πi13/2) which are close to the proton Fermi surface. The dependence of the non-axial octupole effects on the form of energy density functional and on the parameter set is also studied.
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Recommended references: Jie Zhao,Bing-Nan Lu,En-Guang Zhao,Shan-Gui Zhou.(2017).Nonaxial-octupole Y32 correlations in N = 150 isotones from multidimensional constrained covariant density functional theories.[ChinaXiv:201708.00248] (Click&Copy)
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[V1] 2017-08-22 20:09:50 chinaXiv:201708.00248V1 Download
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