Theoretical Nuclear Structure Physics

理论核结构物理

• 批准号: 9603006
• 负责人: Jerry Draayer
• 金额: $ 18万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9603006&HistoricalAwards=false
• 关键词: Theoretical; Nuclear; Structure; Physics

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.

位于巴吞鲁日的路易斯安那州立大学物理与天文学系的核理论项目主要研究极端条件下原子核的性质：高自旋、大变形、拉伸的同位旋等。 这些核的集体模式涉及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。 拟议的研究将集中在几个方面：势能面和激发能;电磁矩和跃迁强度;巨共振;核电流;双β衰变强度;和超变形。 然而，更深层次和更具挑战性的目标，拟议的研究是探索这些特殊功能的核子核子相互作用，引起平均场和观察到的集体现象。 特别是，拟议的计划将继续专注于伪自旋对称性的起源和质子和中子动力学的互补。 研究生的培训（目前为5名）和国际合作（特别是来自前苏联国家和墨西哥）的建设是研究工作的一个组成部分。