Structure of Unstable Nuclei and Astrophysical Reactions

我们已经建立了随机变分方法作为一个可行的工具，以获得精确的解决方案，少体系统。该方法的核心思想是从多个随机选择的状态中选择最佳状态，逐个建立基元。本方法已应用于A=6-10的轻不稳定核。在微观多团簇模型中进行的计算与实验符合得很好。为了预测不稳定核中常见的共振，我们测试了两种定域方法：复标度法和束缚态解析延拓作为耦合常数的函数。用Skyrme Hartree-Fock方法研究了Z=N丰质子核在A=60-80范围内可能存在的轴非对称八极形变态。发现^<68>Se和^<80>Zr分别对Y_2和Y_3形变不稳定<33><32>，而^6He+ α反应对研究^ Be连续体中类分子结构的可能性是重要<10>的.已经进行了微观计算来研究这种散射。初步计算表明，在离阈值4-5 MeV处出现类共振结构。我们通过进一步阐述宇宙、星系和恒星演化的化学和动力学模型，研究了宇宙、星系和恒星的演化。为了更好地理解宇宙学参数以及新星和超新星演化的机制，核合成网络计算中考虑了来自核和粒子反应数据的最新输入。

We have established the stochastic variational method as a viable tool to obtain precise solutions for few-body systems. The key idea of the method is to set up basis elements one by one by selecting the best one from among many randomly chosen states. This method has been applied to light unstable nuclei with A=6-10. The calculation done in a microscopic multicluster model is in good agreement with experiment.To predict resonances that commonly appear in unstable nuclei, two localization methods are tested : the complex scaling method and the analytic continuuation of bound states as a function of coupling constant. In most cases they give equally good results, but the analytic continuuation is found to be suited to obtain the resonance energy and width for S-wave resonances near the threshold.The possible existence of axially asymmetric octupole deformed states in Z=N protonrich nuclei in the region of A=60-80 has been investigated in Skyrme Hartree-Fock method. We have found that ^<68>Se and ^<80>Zr are unstable to the Y_<33> and Y_<32> deformation, respectively.The ^6He+alpha reaction is important to study the possible existence of the molecule-like structure in the continuum of ^<10>Be. A microscopic calculation has been undertaken to investigate this scattering. A preliminary calculation has shown that a resonance-like structure appears at 4-5 MeV from the threshold. Further analysis is needed to confirm this.We have studied the evolution of universe, galaxy and stars by further elaborating the chemical and dynamical model of the evolution. Latest inputs from nuclear and particle reaction data are taken into account in the network calculation of nucleosynthesis in order to better understand the cosmological parameters and the mechanism of the evolution of novac and supernovae.