US-Poland Research on Nuclear Structure at High Spin (Physics)

美国-波兰高自旋核结构研究（物理）

• 批准号: 9115309
• 负责人: Juerg Saladin
• 金额: $ 3.25万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-01 至 1996-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115309&HistoricalAwards=false
• 关键词: US; Poland; Research; Nuclear; Structure

The objective of this US-Poland research project between Dr. Jurg X. Saladin of the University of Pittsburgh and Drs. W. Nazarewicz, S. Cwick, and Z. Szymanski of the University of Warsaw is to study nuclei under conditions of extreme rotational velocities. In the mass 70 to 80 region, the studies will focus on properties of rotational bands which are characterized by rapid changes as a function of the number of protons and neutrons and as a function of angular frequency. The researchers will determine quantities of the moments of inertia, electromagnetic transition rates, spin alignment, signature splitting and signature inversion. They will interpret the results of these measurements by means of cranked shell model calculations, which include Strutinsky averaging and take into account the effects of the pairing interaction. They will search for electric molecule transitions in the mass 80 region using an array of mini- orange electron spectrometers. Monopole transitions depend on the mixing of bands with different shapes and on the changes in the rms radius. The researchers will study the decay of superdeformed bands in the rare earth region into bands of normal deformation using the same measurements. They will also study the octupole effects in the actinide region. This project in theoretical nuclear physics fulfills the program objective of advancing scientific knowledge by enabling leading experts in the United States and Eastern Europe to combine complementary talents and pool resources in areas of strong mutual interest and competence.

这个美国-波兰研究项目的目标是， Jurg X博士匹兹堡大学的萨拉丁和 W.纳扎雷维奇，S. Cwick和Z.西曼斯基 华沙大学将研究原子核 极端的旋转速度。 在70到80人中 区域，研究将集中在旋转的属性 以快速变化为特征的波段， 质子数和中子数的函数， 角频率的函数 研究人员将 确定转动惯量的量， 电磁跃迁率，自旋排列， 签名分裂和签名反转。 他们将 解释这些测量的结果， 曲柄壳模型计算，其中包括Strutinsky 并考虑到配对的影响 互动 他们将寻找电分子 在质量80区域中的过渡使用微- 橙子电子光谱仪。 单极跃迁 取决于不同形状的带的混合， RMS半径的变化。 研究人员将研究 稀土区超形变带的衰变 使用相同的方法将其转化为正常变形的带， 测量. 他们还将研究八极效应 在锕系元素区域。 这个理论核物理项目实现了 通过以下方式提高科学知识的计划目标 使美国和东方的领先专家能够 欧洲将联合收割机互补人才，集中资源 在共同感兴趣和有能力的领域。