Octupole Deformations of Even-Even Rn, Th, and U Nuclei in Relativistic Mean Field Theory

Octupole Deformations of Even-Even Rn, Th, and U Nuclei in Relativistic Mean Field Theory
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相对论平均场论中偶偶 Rn、Th 和 U 原子核的八极变形

DOI:
10.1088/0253-6102/53/6/31
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发表时间:
2010-06
影响因子:
3.1
通讯作者:
ZHAO En-Guang
ZHAO En-Guang
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
MENG Jie;WANG Nan;ZHAO En-Guang

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在反射非对称相对论平均场(RAS-RMF)模型的框架下,系统地研究了偶偶Rn、Th和U同位素的八极形变和其他基态性质.计算结果很好地再现了结合能和四极形变。计算结果表明,随着中子数的增加,基态核从近球形(N = 130)向四极形变核演化。在Rn同位素中,只有(222,224)Rn是八极形变的,且八极形变较小。然而,Th和U同位素中更多的核(N近似或等于134-148)是八极形变的,其中一些核的八极形变是显著的(竖线β近似或大于0.1)。
The octupole deformations and other ground state properties of even-even Rn, Th and U isotopes are investigated systematically within the framework of the reflection asymmetric relativistic mean field (RAS-RMF) model. The calculation results reproduce the binding energies and the quadrupole deformations well. The calculation results indicate these nuclei at ground states evolve from nearly-spherical (N = 130) shape to quadrupole deformation shape with the increase of the neutron number. It is also found that among the Rn isotopes, only (222,224)Rn are octupole deformed and the octupole deformations for them are small. However, more nuclei (N similar or equal to 134-148) in Th and U isotopes are octupole deformed and the octupole deformations for some of them are significant (vertical bar beta vertical bar similar to 0.1 or even larger).
DOI: 10.1016/s0375-9474(98)00178-x
发表时间: 1998-05
期刊: Nuclear Physics
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