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| 1 | Collective Multipole Excitations in a Microscopic Relativistic Approach显示文摘A relativistic mean field description of collective excitations of atomic nuclei is studied in theframework of a fully self-consistent relativistic random phase approximation (RRPA). In particular,resultsof RRPA calculations of multipole giant resonances and of low-lying collective states in spherical nucleiare analyzed. | A.Wandelt Nguyen Van Giai D.Vretenar P.Ring | 2002 | Annual Report of China Institute of Atomic Energy2002，，0： | 3 |
| 2 | Time-dependent Relativistic Mean-field Theory and Random Phase Approximation显示文摘The relativistic random phase approximation (RRPA) is derived from the time-dependent relativistic mean field (TD RMF) theory in the limit of small amplitude oscillations. In the no-sea approximation of the RMF theory, the RRPA configuration space includes not only the usual particle-hole ph-states, but also ah configurations, i.e. pairs formed from occupied states in the Fermi sea and empty negative-energy states in the Dirac sea. The contribution of the negative energy states to the RRPA matrices is examined in a schematic model, and the large effect of Dirac sea states on isoscalar strength distributions is illustrated for the giant monopole resonance in 116Sn. It is shown | P.Ring D.Vretenar A.Wandelt NguyenVanGiai MAZhong-yu CAOLi-gang | 2001 | Annual Report of China Institute of Atomic Energy2001，，0： | 1 |
| 3 | 核的集体多极激发的相对论微观研究显示文摘在完全自洽的相对论无规位相近似下研究了核的集体激发,分析了核的多极巨共振和低的集体激发态的相对论无规位相近似计算结果。研究表明采用的有效拉格朗日密度不仅能在相对论平均场理论下很好地描述核的基态性质,而且能给出核的低集体激发态和巨共振态的能量与实验数据令人满意的符合。相对论无规位相近似方法能成功描述有限核动力学性质的两个基本要点是:1)有效拉格朗日密度必须包含介子的非线性自相互作用;2)Dirac海中负能态的完全自洽处理。 | 马中玉 A.Wandelt NguyenVanGiai D.Vretenar P.Ring 曹李刚 | 2002 | 中国原子能科学研究院年报2002，，1： | 0 |
| 4 | Odd Systems in Deformed Relativistic Hartree Bogoliubov Theory in Continuum显示文摘In order to describe the exotic nuclear structure in unstable odd-A or odd-odd nuclei,the deformed relativistic Hartree Bogoliubov theory in continuum is extended to incorporate the blocking effect due to the odd nucleon.For a microscopic and self-consistent description of pairing correlations,continuum,deformation,blocking effects,and the extended spatial density distribution in exotic nuclei,the deformed relativistic Hartree Bogoliubov equations are solved in a Woods Saxon basis in which the radial wave functions have a proper asymptotic behavior at large r.The formalism and numerical details are provided.The code is checked by comparing the results with those of spherical relativistic continuum Hartree Bogoliubov theory in the nucleus 19O.The prolate deformed nucleus 15 C is studied by examining the neutron levels and density distributions. | 李璐璐 孟杰 P.Ring 赵恩广 周善贵 | 2012 | Chinese Physics Letters2012，29，4： | 0 |
| 5 | 能量密度泛函理论和有限力程可分离对相互作用研究核的超流性质显示文摘在相对论密度泛函理论框架下引入了可分离的对相互作用,它的参数是由拟合核物质中Gogny力对关联性质来确定。在有限核的相对论Hartree-Bogoliubov和相对论准粒子无规位相近似的理论框架下,建立了可分离对相互作用在球形核和变形核中粒子-粒子道矩阵的计算方法。通过Talmi和Moshinsky变换,这种新的对相互作用在坐标空间下可以展开成一系列可分离项,并且很快收敛。它不仅保持了平移不变性,而且作为有限力程的对力,可以避免零程对力在高动量截断的困难。通过对Sn同位素链核基态、E2和E3激发态性质,以及Sm同位素链基态的性质研究,发现可分离对相互作用能够再现用Gogny对力得到的球形核的超流性质,并能够很好地符合已有的实验结果。这种方法还可用来描述任意微观对相互作用,并推广于三轴形变原子核以及转动系统的研究。为考虑角动量投影和粒子数投影的生成坐标(GCM)方法和粒子-振动耦合(PVC)理论提供更加真实的对关联性质描述。 | 马中玉 田源 P.Ring | 2010 | 原子核物理评论2010，27，2： | 0 |
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