Theoretical Nuclear Structure Physics

位于巴吞鲁日的路易斯安那州立大学物理与天文系的核理论项目主要研究原子核在极端条件下的性质：高自旋、大变形、拉伸同位旋等。特别令人感兴趣的是稀土和锕系区的强形变核的结构。这些原子核的集体模式涉及到组成核子总数的很大一部分，因此需要一种特殊的壳模型理论——一种不受独立粒子图像通常约束的理论——来理解这些集体特征。提出的研究将集中在几个方面：势能面和激发能；电磁矩和过渡强度；巨大的共鸣;核电流;双β衰变强度；和superdeformation。然而，我们所提出的研究的一个更深层次和更具挑战性的目标是探索产生平均场和观察到的集体现象的核子-核子相互作用的那些特殊特征。特别地，计划将继续关注伪自旋对称的起源和质子和中子动力学的互补。培养研究生（目前有五名）和建立国际合作（特别是来自前苏联国家和墨西哥的合作）是研究工作的组成部分。

The nuclear theory program in the Department of Physics and Astronomy at Louisiana State University in Baton Rouge is focused on the properties of atomic nuclei under extreme conditions: high spin, large deformation, stretched isospin, etc. Of special interest is the structure of strongly deformed nuclei of the rare earth and actinide regions. The collective modes of these nuclei involve a large fraction of the total number of constituent nucleons and therefore a special shell-model theory --- one that is not bound by the usual constraints of an independent particle picture --- is required to understand these collective features. The proposed research will focus on several matters: potential energy surfaces and excitation energies; electromagnetic moments and transition strengths; giant resonances; nuclear currents; double beta decay strengths; and superdeformation. However, a deeper and more challenging objective of the proposed research is to probe those special features of the nucleon-nucleon interaction that give rise to mean fields and observed collective phenomena. In particular, the proposed program will continue to focus on the origin of pseudo-spin symmetry and the complementary of proton and neutron dynamics. The training of graduate students (currently five) and the building of international collaborations (from former Soviet Union countries and Mexico, in particular) are an integral part of the research effort.