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国家自然科学基金(11175252)

作品数:6 被引量:16H指数:3
相关作者:温凯曾谨言张振华贺晓涛赵恩广更多>>
相关机构:中国科学院北京大学南京航空航天大学更多>>
发文基金:国家自然科学基金国家重点基础研究发展计划中国科学院知识创新工程重要方向项目更多>>
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Theoretical study on fusion dynamics and evaporation residue cross sections for superheavy elements被引量:1
2013年
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 surface.The intrinsic energy and the maximum dynamical deformations for48Ca+248Cm are calculated.The effect of dynamical deformation on the potential energy surface and fusion is investigated.It is found that the dynamical deformation influences the potential energy surface and fusion probability significantly.The dependence of the fusion probability on the angular momentum is investigated.The 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.
WANG NanZHAO EnguangZHOU Shangui
关键词:蒸发残渣超重元素超重核合成势能面
Entrance-channel dynamics in the reaction 40Ca+208Pb
2019年
The entrance-channel dynamics including capture, fusion, and quasifission processes for the reaction ^40Ca+^208Pb is investigated in the fully microscopic time-dependent Hartree-Fock(TDHF) theory. The calculations are performed in three-dimensional Cartesian coordinate without any symmetry restrictions, in which the full Skyrme energy functional SLy4d and SLy5 are adopted.We study the energy dependence of capture cross sections, and find that the experimental data are well reproduced by the TDHF calculations. Both fusion and quasifission events are observed in the reaction ^40Ca+^208Pb. The contact time, mass and charge of quasifission fragments show a wide distribution in SLy4d compared with SLy5, implying that more nucleons are transferred in the SLy4d calculations. We find that the total kinetic energy of quasifission fragments in the TDHF calculations is distributed around Viola systematics, indicating that most of the relative kinetic energy is dissipated in quasifission dynamics.
Xiao Yu LiZhen Ji WuLu Guo
关键词:CAPTUREFUSIONQUASIFISSION
Recent progress in theoretical studies of nuclear magnetic moments被引量:5
2012年
Nuclear magnetic moment is highly sensitive to the underlying structure of atomic nuclei and therefore serves as a stringent test of nuclear models. The advanced nuclear structure models have been successful in analyzing many nuclear structure properties, but they still cannot provide a satisfactory description of nuclear magnetic moments. Recently attempts to summarize the present understanding on nuclear magnetic moments in both relativistic and non-relativistic theoretical models have been made. The detailed contents are covered in the issue entitled "Nuclear magnetic moments and related topics" (in Sci China Phys Mech Astron, Vol. 54, No. 2, 2011). In this paper some of the related achievements will be highlighted.
ZHAO EnGuang
关键词:核磁矩相对论理论核模型原子核天文学
超Fm原子核转动谱的系统研究被引量:3
2013年
简要介绍超Fm原子核谱学的实验和理论研究进展,并综述本研究组近期在超Fm原子核谱学方面的一些理论研究工作,包括:利用转动谱公式系统研究了超Fm核区偶偶核与奇A核的转动谱。结果表明,在二参数公式中,相较于AB公式和Harris公式,ab公式能够更好地描述偶偶核基态转动带;通过拟合超Fm核区奇A核的单粒子能级,提出了一组轨道角动量依赖的Nilsson新参数;利用粒子数守恒方法处理对关联,基于推转壳模型,系统研究了超Fm原子核转动谱,计算得到的转动惯量、角动量顺排等与实验符合;通过分析费米面附近Nilsson能级的占据几率以及各条轨道对角动量顺排的贡献,解释了这个质量区原子核的转动带产生回弯(上弯)的原因。进一步,利用这组新Nilsson参数,研究了超重核的单粒子能级结构以及微观壳修正能量。计算表明,这组新Nilsson参数预言的超重岛中心为Z=120和N=182。
张振华温凯贺晓涛曾谨言赵恩广周善贵
关键词:转动谱粒子数守恒方法推转壳模型
Effect of tensor force on dissipation dynamics in time-dependent Hartree-Fock theory被引量:8
2014年
The role of tensor force on the collision dynamics of16O+16O is investigated in the framework of a fully three-dimensional timedependent Hartree-Fock theory.The calculations are performed with modern Skyrme energy functional plus tensor terms.Particular attention is given on the analysis of dissipation dynamics in heavy-ion collisions.The 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 freedom.We reveal that the tensor forces may either enhance or reduce the energy dissipation depending on the different parameter sets.The 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.
DAI GaoFengGUO LuZHAO EnGuangZHOU ShanGui
张量力在^16O+^16O熔合动力学中的效应
2017年
利用时间相关Hartree-Fock理论和完整Skyrme有效相互作用研究了^(16)O+^(16)O碰撞在库仑位垒附近的熔合动力学。数值计算是在没有任何对称性约束的三维笛卡尔基下完成。将时间相关Hartree-Fock理论和冻结密度近似下的能量密度泛函方法给出的库仑位垒与实验结果进行了比较,发现同位旋标量的张量项能降低自旋饱和体系^(16)O+^(16)O的库仑位垒,而库仑位垒高度随着同位旋矢量的张量项的耦合常数减小而降低。并计算了包含和不包含张量力的^(16)O+^(16)O熔合截面,发现张量力对^(16)O+^(16)O碰撞在库仑位垒附近的熔合动力学影响较小。
石龙郭璐
关键词:熔合反应库仑位垒
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