Studies of Nuclear Reactions and Structure

这是一份支持佛罗里达州立大学实验核物理小组的提案。这项拟议的研究将在FSU串列/直线加速器设施和美国周围的其他实验室进行。FSU设施的改进，包括新的高效“三叶草”探测器、放射性14C束流和高强度、高度极化的7Li束流，将对研究S-d壳核的高自旋结构远不稳定，测试微观和宏观核模型，探索鳗系元素核的八极集合性，以及研究丰中子中等质量核的结构将有价值。极化的7Li束提供了一种很好的方法来探索松散束缚核的形状和内部结构如何影响散射和传输过程，特别是与晕核中如此重要的连续统的耦合。我们在共振粒子衰变光谱仪器方面的发展将使我们能够对轻核的阿尔法衰变特性进行高分辨率研究，以探索镜像态、星系团结构和感兴趣的天体物理宽度。FSU串列/直线加速器及其相关仪器非常适合于少数电子离子的精密快束激光光谱分析，以测试原子结构计算中的相对论和更高阶QED效应。我们建议利用国家超导回旋实验室在升级后的新能力，包括FSU正在帮助建造的紧凑型光束扫描器磁体，来检查奇异原子核中的质子和中子多极矩阵元素，并探测“晕”原子核的动量分布。计划使用Gammasphere和Euroball进行实验，以研究超高自旋时配对关联的猝灭和其他可能的戏剧性相变。我们团队主要负责为PHENIX实验建造两个环成像切伦科夫探测器，该实验经过优化，可以研究相对论重离子碰撞中形成的热而致密的核物质的内部，并计划参与对夸克-胶子等离子体特征的数据挖掘。我们小组的成员计划开发新一代电子加速器和探测器，利用杰斐逊实验室、麻省理工学院贝茨和美因茨微加速器的(e，e‘p)反应对核子和轻核进行精确研究。我们小组直接参与了杰斐逊实验室CEBAF大接受光谱仪的建造和调试，现在参与了E1实验计划，以研究含有奇怪夸克的系统的电产生和衰变，以增加对基本两粒子相互作用的理解。

9970991TaborThis is a proposal for support of the experimental nuclear physics group at Florida State University. The proposed research is to be carried out at the FSU Tandem/LINAC accelerator facility and at other laboratories around the U.S. Improvements at the FSU facility, including new high-efficiency 'clover' detectors, a radioactive 14C beam and an intenxe, highly polarized 7Li beam will be valuable for investigations of the high-spin structure of s-d shell nuclei far from stability to test microscopic and macroscopic nuclear models, for exploring octupole collectivity in actinide nuclei, and for studying the structure of neutron-rich mid-mass nuclei. The polarized 7Li beam provides an excellent way to explore how the shape and internal structure of a loosely bound nucleus affect scattering and transfer processes, especially the couplings to the continuum which are so important in halo nuclei. Our developments in resonant particle decay spectroscopy instrumentation will permit high resolution studies of the alpha decay properties of light nuclei to explore mirror states, cluster structure, and widths of astrophysical interest. The FSU Tandem/LINAC and associated instrumentation are well suited to precision fast-beam laser spectroscopy of few electron ions to test relativistic and higher order QED effects in atomic structure calculations.We propose to take advantage of the new capabilities at the National Superconducting Cyclotron Laboratory after the upgrade, including the compact beam sweeper magnet which FSU is helping build, to examine proton and neutron multipole matrix elements in exotic nuclei and to probe the momentum distributions of 'halo' nuclei. Experiments are planned using Gammasphere and Euroball to investigate the quenching of pairing correlations and possible other dramatic phase changes at ultra-high spins. Our group has the primary responsibility for constructing the two Ring-imaging Cherenkov detectors for the PHENIX experiment, which is optimized to study the interior of hot dense nuclear matter formed in relativistic heavy-ion collisions, and plans to be involved in 'mining' the data for signatures of quark-gluon plasma. Members of our group plan to exploit the new generation of electron accelerators and detectors for precision studies of the nucleon and light nuclei using the (e,e'p) reaction at Jefferson Lab, MIT-Bates, and the Mainz Microtron. Our group has been directly involved in the construction and commissioning of the CEBAF Large Acceptance Spectrometer at Jefferson Lab and is now involved in the e1 experimental program to study the electroproduction and decay of systems containing strange quarks to add to the understanding of fundamental two-particle interactions.