Electromagnetic Moment Measurements and Non-Yrast Spectroscopies

电磁矩测量和非拉斯特光谱

• 批准号: 8921800
• 负责人: Noemie Koller
• 金额: $ 72万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-04-15 至 1993-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8921800&HistoricalAwards=false
• 关键词: Electromagnetic; Moment; Measurements; Non; Yrast

Investigations of non-yrast spectroscopies and electromagnetic moments of nuclei in high-spin states or far- from stability are being planned at several laboratories: Argonne, Livermore, Yale, Rochester, and Notre Dame. Experiments carried out with both heavy and light projectiles will concern the onset of collectivity in Te and Po nuclei, non-yrast degrees of freedom in Hf nuclei, statistical transitions following fusion reactions, prompt decay of fission fragments, shape isomers around A=190, the structure of light actinides, and heavy-ion induced two-neutron transfer reactions. Magnetic dipole and electric quadrupole moments will be measured with a variety of standard and developing technologies involving transient magnetic fields, multi-tilted foil assemblies designed to polarize the nuclei under study, and beta-NMR detection systems. These studies are geared to fully utilize the existing Rochester mass separator and the New Fragment Mass Analyzer being built at Argonne (ATLAS).

阿贡、利弗莫尔、耶鲁、罗切斯特和巴黎圣母院等几个实验室正在计划对处于高自旋态或远离稳定状态的原子核的非yrast光谱和电磁矩进行研究。用重弹和轻弹进行的实验将涉及Te核和Po核的集体性开始、Hf核的非yrast自由度、聚变反应后的统计跃迁、裂变碎片的快速衰变、A=190附近的形状异构体、轻鳗系元素的结构以及重离子引起的双中子转移反应。将使用各种标准和开发中的技术来测量磁偶极矩和电四极矩，这些技术包括瞬变磁场、为使研究中的原子核极化而设计的多倾斜箔组件，以及贝塔-核磁共振检测系统。这些研究旨在充分利用现有的罗切斯特质量分离器和正在阿贡建造的新碎片质量分析器(ATLAS)。