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Ground state properties and potential energy surfaces of 270Hs from multidimensionally-constrained relativistic mean field model

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Science China(Physics,Mechanics & Astronomy) 2020年第1期63卷 70-80页

作者： Xu Meng BingNan Lu shangui zhou CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Facility for Rare Isotope Beams and Department of Physics and Astronomy Michigan State UniversityLansing MI 48824USA Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000China Synergetic Innovation Center for Quantum Effects and Application Hunan Normal UniversityChangsha 410081China

We study the ground state properties, potential energy curves and potential energy surfaces of the superheavy nucleus270 Hs by using the multidimensionally-constrained relativistic mean-field model with the effective interaction PC-PK1. The binding energy,size and shape as well as single particle shell structure corresponding to the ground state of this nucleus are obtained.270 Hs is well deformed and exhibits deformed doubly magic feature in the single neutron and proton level schemes. One-dimensional potential energy curves and two-dimensional potential energy surfaces are calculated for270 Hs with various spatial symmetries imposed. We investigate in detail the effects of the reflection asymmetric and triaxial distortions on the fission barrier and fission path of270 Hs. When the axial symmetry is imposed, the reflection symmetric and reflection asymmetric fission barriers both show a double-hump structure and the former is higher. However, when triaxial shapes are allowed the reflection symmetric barrier is lowered very much and then the reflection symmetric fission path becomes favorable.

关键词： MDC-RMF model superheavy nuclei potential energy surface fission barrier reflection asymmetry triaxial deformation

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Theoretical study of fusion reactions ^(32)S + ^(94,96)Zr and ^(40)Ca + ^(94,96)Zr and quadrupole deformation of ^(94)Zr

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Science China(Physics,Mechanics & Astronomy) 2016年第4期59卷 58-65页

作者： Bing Wang WeiJuan Zhao EnGuang Zhao shangui zhou Department of Physics Zhengzhou University State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator

The dynamic coupling effects on fusion cross sections for reactions^(32)S + ^(94,96)Zr and ^(40)Ca + ^(94,96)Zr are studied with the universal fusion function formalism and an empirical coupled channel(ECC) model. An examination of the reduced fusion functions shows that the total effect of couplings to inelastic excitations and neutron transfer channels on fusion in ^(32)S +^(94)Zr(^(40)Ca +^(94)Zr) is almost the same as that in ^(32)S +^(96)Zr(^(40)Ca +^(96)Zr). The enhancements of the fusion cross section at sub-barrier energies due to inelastic channel coupling and neutron transfer channel coupling are evaluated separately by using the ECC model. The results show that effect of couplings to inelastic excitations channels in the reactions with94 Zr as target should be similar as that in the reactions with ^(96) Zr as target. This implies that the quadrupole deformation parameters β_2of ^(94)Zr and^(96) Zr should be similar to each ***, β_2 's predicted from the finite-range droplet model, which are used in the ECC model, are quite different. Experiments on^(48) Ca +^(94)Zr or^(36) S +^(94)Zr are suggested to solve the puzzling issue concerning β_2for^(94)Zr.

关键词： empirical coupled channel model barrier distribution universal fusion function neutron transfer

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Editorial

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Science China(Physics,Mechanics & Astronomy) 2009年第10期52卷 1449-1451页

作者： Meng Jie Liu YuXin zhou shangui School of Physics Peking UniversityPekingChina Institute of Theoretical Physics Chinese Academy of SciencesBeijingChina

In recent years several Large-Scale Scientific Facilities (LSSF) for nuclear,hadronic,and particle physics have been upgraded and constructed in China.

关键词： Editorial BES

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Effect of tensor force on dissipation dynamics in time-dependent Hartree-Fock theory

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Science China(Physics,Mechanics & Astronomy) 2014年第9期57卷 1618-1622页

作者： DAI GaoFeng GUO Lu ZHAO EnGuang zhou shangui State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences School of Physics University of Chinese Academy of Sciences Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator

The role of tensor force on the collision dynamics of16O+16O is investigated in the framework of a fully three-dimensional timedependent Hartree-Fock *** calculations are performed with modern Skyrme energy functional plus tensor *** attention is given on the analysis of dissipation dynamics in heavy-ion *** energy dissipation is found to decrease as an initial bombarding energy increases in deep-inelastic collisions for all the Skyrme parameter sets studied here because of the competition between the collective motion and the single-particle degrees of *** reveal that the tensor forces may either enhance or reduce the energy dissipation depending on the different parameter *** fusion cross section without tensor force overestimates the experimental value by about 25%,while the calculation with tensor force T11 has good agreement with experimental cross section.

关键词： time-dependent Hartree-Fock tensor force dissipation dynamics

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Theoretical study on fusion dynamics and evaporation residue cross sections for superheavy elements

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Nuclear Science and Techniques 2013年第5期24卷 107-112页

作者： WANG Nan ZHAO Enguang zhou shangui College of Physics Shenzhen University State Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of Sciences Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator

The nuclear dynamical deformation,the fusion probability and the evaporation residue(ER) cross sections for the synthesis of superheavy nuclei are studied with the di-nuclear system model and the related dynamical potential energy *** intrinsic energy and the maximum dynamical deformations for48Ca+248Cm are *** effect of dynamical deformation on the potential energy surface and fusion is *** is found that the dynamical deformation influences the potential energy surface and fusion probability *** dependence of the fusion probability on the angular momentum is *** ER cross sections for some superheavy nuclei in48Ca induced reactions are calculated and it is found that the theoretical results are in good agreement with the experimental results.

关键词：蒸发残渣超重元素截面聚变动力超重核合成计算结果动态变形势能面

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费米海与狄拉克海中的单粒子态--从球形核狄拉克方程说起

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中国科学：物理学、力学、天文学 2016年第1期46卷 12-23页

作者：周善贵中国科学院理论物理研究所、理论物理国家重点实验室北京100190 兰州重离子加速器国家实验室原子核理论中心兰州730000

在原子核的协变密度泛函理论中,核子的运动方程——狄拉克方程是核心内容之一.本评述结合球形核中核子狄拉克方程的数值求解,讨论费米海与狄拉克海中单粒子态及若干相关的物理问题.首先以打靶法为例较为详细地介绍在坐标空间中求解狄拉... 详细信息

在原子核的协变密度泛函理论中,核子的运动方程——狄拉克方程是核心内容之一.本评述结合球形核中核子狄拉克方程的数值求解,讨论费米海与狄拉克海中单粒子态及若干相关的物理问题.首先以打靶法为例较为详细地介绍在坐标空间中求解狄拉克方程的过程,以伍兹-萨克森基(包括薛定谔-伍兹-萨克森基和狄拉克-伍兹-萨克森基)展开方法为例介绍在基空间中狄拉克方程的求解方法.完备性的条件要求狄拉克-伍兹-萨克森基空间不仅要包括费米海中的正能量态,而且要包括狄拉克海中的负能量态.因此,需要把单粒子态的研究从正能量态拓展到负能量态.结合负能量态的研究,介绍与这些负能量态对应的反核子谱中存在的自旋对称性及其起源.

关键词：协变密度泛函理论狄拉克方程自旋对称性赝自旋对称性

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Shape Decoupling Effects and Rotation of Deformed Halo Nuclei

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原子核物理评论 2024年第1期41卷 75-85页

作者： SUN Xiangxiang zhou shangui School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China

With the development of radioactive-ion-beam facilities,many exotic phenomena have been discovered or predicted in the nuclei far from the stability line,including cluster structure,shell structure,deformed halo,and shape decoupling *** study of exotic nuclear phenomena is at the frontier of nuclear physics *** covariant density functional theory(CDFT)is one of the most successful microscopic models in describing the structure of nuclei in almost the whole nuclear *** the framework of CDFT,toward a proper treatment of deformation and weak binding,the deformed relativistic Hartree-Bogoliubov theory in continuum(DRHBc)has been *** this contribution,we review the applications and extensions of the DRHBc theory to the study of exotic *** DRHBc theory has been used to investigate the deformed halos in B,C,Ne,Na,and Mg isotopes and the theoretical descriptions are reasonably consistent with available data.A DRHBc Mass Table Collaboration has been founded,aiming at a high precision nuclear mass table with deformation and continuum effects included,which is *** implementing the angular momentum projection based on the DRHBc theory,the rotational excitations of deformed halos have been investigated and it is shown that the deformed halos and shape decoupling effects also exist in the low-lying rotational excitation states of deformed halo nuclei.

关键词： exotic nuclei deformed halo shape decoupling effect nuclear mass rotational excitation density functional theory

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变形核中的晕现象与形状退耦合

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核技术 2023年第8期46卷 139-147页

作者：孙向向周善贵中国科学院大学核科学与技术学院北京100049 中国科学院理论物理研究所中国科学院理论物理前沿重点实验室北京100190 中国科学院大学物理学院北京100049 湖南师范大学量子效应及其应用协同创新中心长沙410081 中国科学院理论物理研究所北京航空航天大学彭桓武科教合作中心北京100191

随着放射性核束物理的快速发展,在远离β稳定线的原子核中发现或者预言了很多奇特核结构现象,包括变形晕、变形晕核中形状退耦合等。对这些奇特核现象的研究是当前核物理的重要前沿领域。协变密度泛函理论是目前最为成功的用于描述原子... 详细信息

随着放射性核束物理的快速发展,在远离β稳定线的原子核中发现或者预言了很多奇特核结构现象,包括变形晕、变形晕核中形状退耦合等。对这些奇特核现象的研究是当前核物理的重要前沿领域。协变密度泛函理论是目前最为成功的用于描述原子核结构性质的理论模型之一。本文介绍基于协变密度泛函理论对变形晕核研究的结果和进展。考虑连续谱效应的形变相对论Hartree-Bogoliubov理论实现了变形晕核的微观自洽描述并预言了镁-44中的变形晕和核芯与晕的形状退耦合现象。之后,该理论还被用于研究硼和碳等同位素链原子核中的变形晕现象。基于该理论的角动量投影计算表明:在变形晕核的低激发转动态中依然存在晕现象以及形状退耦合现象。

关键词：协变密度泛函理论变形晕核形状退耦合转动激发

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Decomposition of EOS of Symmetric Nuclear Matter into Different Spin-isospin Channels

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2008年第1期 6-7页

作者： Zuo Wei zhou shangui Li Junqing Zhao Enguang Scheid W 不详 Institute of Theoretical Physics Chinese Academy of sciences Beijing China Institute for Theoretische Physik der Justus Liebig-Universitst D 35392 Giessen Germany

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新世纪的物理学如何应对能源和环境问题(Ⅱ)核能篇

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物理教学探讨（中学教学教研版） 2009年第8期27卷 1-4页

作者：周善贵中国科学院理论物理研究所

何为核能质能关系——质量即能量；物质转化——能量释放或吸收；原子核衰变、裂变和聚变——大量能量的转移。1905年，爱因斯坦提出了质能关系：E=mc^2，其中c为光速，E为能量，m为质量。这个关系告诉我们，物质和能量是等价的，或者... 详细信息

何为核能质能关系——质量即能量；物质转化——能量释放或吸收；原子核衰变、裂变和聚变——大量能量的转移。1905年，爱因斯坦提出了质能关系：E=mc^2，其中c为光速，E为能量，m为质量。这个关系告诉我们，物质和能量是等价的，或者说，能量是物质存在的一种方式。因此，物质在不同形式之间的转换必然伴随着能量的吸收或释放。例如，植物生长过程中，吸收太阳能，并通过光合作用将其转化为化学能储存在体内；植物秸杆燃烧成为灰烬和二氧化碳，释放出化学能。

关键词：环境问题核能物理学能量释放能源爱因斯坦生长过程光合作用

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