Restoration of rotational symmetry in deformed relativistic mean-field theory

We report on a very recently developed three-dimensional angular momentum projected relativistic mean-field theory with point-coupling interaction (3DAMP+RMF-PC). Using this approach the same effective nucleon-nucleon interaction is adopted to describe both the single-particle and collective motions in nuclei. Collective states with good quantum angular momentum are built projecting out the intrinsic deformed mean-field states. Results for ²⁴Mg are shown as an illustrative application.     

Stability of Strutinsky Shell Correction Energy in Relativistic Mean Field Theory

The single-particle spectrum obtained from the relativistic mean field （RMF） theory is used to extract the shell correction energy with the Strutinsky method. Considering the delicate balance between the plateau condition in the Strutinsky smoothing procedure and the convergence for the total binding energy, the proper space sizes used in solving the RMF equations are investigated in detail by taking ^208 Pb as an example. With the proper space sizes, almost the same shell correction energies are obtained by solving the RMF equations either on basis space or in coordinate space.     

核物质的对称能与中子皮厚度(英文)

在现有的平均场模型中引入同位旋相关的高阶修正项．研究了核物质对称能的密度依赖性和。^208Pb的中子皮厚度。采用新提出的PK1相互作用以及NL3．S271和Z271相互作用．得到核物质饱和点对称能的范围为29-38MeV以及相应的^208Pb中子皮厚度为0．17—0.28fm．在所有相互作用中，核物质饱和点的对称能与^208Pb的中子皮厚度近似呈线性关系。After adding isospin dependent high order correction terms to existing relativistic mean field models (RMF), the density dependence of symmetry energy and the neutron skin thickness S for 208Pb are studied. Using the new effective interaction PK1, together with NL3, S271 and Z271, a range of 29—38 MeV for the symmetry energy for nuclear matter at saturation point and the corresponding neutron skin thickness S = 0.14—0.28 fm for 208Pb are obtained. For all effective interactions, a linear relation between the symmetry energy at saturation point and the neutron skin thickness for 208Pb is observed.     

Spin Symmetry for Anti-Lambda Spectrum in Atomic Nucleus

The spin symmetry of the anti-Lambda spectrum in nucleus 16O is studied in the relativistic mean field theory. The spin-orbit splittings of spin doublets are found to be around 0.03-0.07MeV and the dominant components of the Dirac spinor for the anti-Lambda spin doublets are found to be near identical. It is indicated that there is an even better spin symmetry in the anti-Lambda spectrum than that in the anti-nucleon spectrum.     

Deformation Effect on the Center-of-Mass Correction Energy in Nuclei Ranging from Oxygen to Calcium

The microscopic c.m. correction energies for nuclei ranging from oxygen to calcium are systematically calculated by both spherical and axially deformed relativistic mean-field （RMF） models with the effective interaction PK1. The microscopic c.m. correction energies strongly depend on the isospin as well as deformation and deviate from the phenomenological ones. The deformation effect is discussed in detail by comparing the deformed with the spherical RMF calculation. It is found that the direct and exchange terms of the c.m. correction energies are strongly correlated with the density distribution of nuclei and are suppressed in the deformed case.     

单粒子共振态的实稳定方法研究

基于实稳定方法的基本思想，在坐标空间求解了一维势阱和三维球对称势阱中的单粒子共振态，得到的共振能量、宽度和波函数等与散射相移法以及耦合常数的解析延拓方法的结果一致. 关键词： 共振态 实稳定方法 相移 共振宽度     

酶催化光度法测定盐酸多巴酚丁胺

盐酸多巴酚丁胺属β肾上腺素受体激动药,用于治疗各种不同原因引起的心肌收缩力衰弱的心衰[1-2]。因此,探索简单、灵敏的测定盐酸多巴酚丁胺的方法对于临床医学和药物分析具有非常重要的意义。目前,文献报道的盐酸多巴酚丁胺的测定方     

基于非对称粒子空穴组态的手征双重带

利用三轴形变的粒子转子模型对基于非对称粒子空穴组态πg–1 9/2 νh11/2和πh–1 11/2 νi13/2等的手征双重带进行了研究.详细分析了转动能谱、角动量随转动频率的变化关系、以及约化跃迁几率B(E2)和B(M1)等性质.发现基于非对称组态的三轴形变原子核也有类似对称组态的手征双重带现象.但它们所对应的最佳三轴形变值从γ=30°变为γ～27°.随着组态中价核子角动量的增加,出现手征双重带的自旋随之增加,简并区间也相应增大     

Rotational Band Structures of Non-Axial Octupole Deformed Shapes

The rotational band structures associated with the intrinsic non-axial octupole deformed states, especially for the intrinsic ground state of the even-even nuclei, are analysed by using the reflection asymmetric shell model. These band structures are expected to be useful in identifying such exotic shapes from experiment. As an example, a possible triangular shape of ^148Sm is suggested.     

相对论平均场理论对新核素259Db及其α衰变链的研究

利用相对论平均场理论系统地探讨了新核素2 5 9Db及其α衰变链的性质和结构以及对关联效应与形变效应的影响 .考虑对关联影响后的变形相对论平均场理论成功再现了实验的Qα 并揭示了所研究的α衰变链具有较大的形变 .在此基础上进一步讨论了新核素2 5 9Db及其α衰变链的形变单粒子能级结构