Nuclear Structure at High Spin (Physics)

高自旋核结构（物理）

• 批准号: 8820428
• 负责人: Juerg Saladin
• 金额: $ 34.15万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-01-01 至 1991-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8820428&HistoricalAwards=false
• 关键词: Nuclear; Structure; Spin; Physics

This grant supports experimental research on the physics ofnuclei at extreme rotational velocities. The nucleons inside such a rapidly rotating system are subject to centrifugal and Coriolis interactions which introduce significant changes in nuclear structure, including changes in nuclear shape and moment of inertia. These interactions also cause transitionsbetween superfluid and rigid behaviour and between collective and single-particle motion. These phenomena will be studiedin nuclei with 60 to 90 nucleons using an array of gamma ray detectors. Rapidly rotating neutron-rich systems produced by means of heavy ion induced deep inelastic collisions will also be studied with this array. Another set of experiments will search for thetheoretically expected electric monopole transitions betweenstates with different shapes, using an array of sixelectronspectrometers in combination with a gamma detector array at the Oak Ridge National Laboratory.

这笔经费用于支持极端旋转速度下原子核物理学的实验研究。在这样一个快速旋转的系统中，核子受到离心和科里奥利相互作用的影响，这导致了核结构的重大变化，包括核形状和转动惯量的变化。这些相互作用还导致超流体和刚性行为之间以及集体和单粒子运动之间的过渡。这些现象将在有60到90个核子的原子核中使用一组伽马射线探测器进行研究。该阵列还将研究由重离子诱导的深度非弹性碰撞产生的快速旋转富中子系统。另一组实验将利用橡树岭国家实验室的六电子能谱仪阵列和伽马探测器阵列，寻找理论上预期的不同形状状态之间的电单极子跃迁。