Superdeformed Lambda hypernuclei within relativistic mean field models
Superdeformed Lambda hypernuclei within relativistic mean field models
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相对论平均场模型中的超变形 Lambda 超核
DOI：
10.1103/physrevc.89.044307
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发表时间：
2014-03
影响因子：
3.1
通讯作者：
Shan-Gui Zhou
中科院分区：
文献类型：
--
作者：
Bing-Nan Lu;Emiko Hiyama;Hiroyuki Sagawa;Shan-Gui Zhou
利用多维约束相对论平均场（MDC-RMF）模型研究了Ar同位素的超形变（SD）态和相应的SD超核.我们发现Ar同位素SD态的密度分布在表面附近表现出强烈的局域性，具有环形结构，而中心部分的密度是稀的，表现出空穴结构。SD密度的这种局部化导致超子波函数发生明显的变形，并导致Ar同位素SD超核中的核心和超子之间出现很大的重叠。然后，SD态的λ分离能变得大于正常变形或球形基态的λ分离能。这一特征不同于S-32、Ni-56和Zn-60等核中大变形态的λ分离能较小的特征。在这种情况下，λ分离能的测量可以提供关于SD态的密度分布的局部化的重要信息。
We study the superdeformed (SD) states and corresponding SD hypernuclei of Ar isotopes with the multidimensionally constrained relativistic mean field (MDC-RMF) models, which can accommodate various shape degree of freedom. We found that the density profiles of SD states in Ar isotopes show a strong localization with a ring structure near the surface, while the central part of the density is dilute, showing a hole structure. This localization of SD density induces an appreciable deformation in the hyperon wave function and results in a large overlap between the core and the hyperon in the SD hypernuclei of Ar isotopes. Then the Lambda separation energy of the SD state becomes larger than that of a normally deformed or spherical ground state. This feature is different from that found in other nuclei such as S-32, Ni-56, and Zn-60 in which the Lambda separation energy of larger deformed state is smaller. In this context, the measurement of the Lambda separation energy may provide important information on the localization of the density profile of SD states.
锕系元素三峰势垒的多维约束相对论平均场研究
影响因子：
3.1
作者：
Lu, Bing-Nan;Vretenar, Dario;Zhao, En-Guang;Zhou, Shan-Gui
通讯作者：
Zhou, Shan-Gui