Nuclear Structure Studies with 4 pi Detector Arrays

使用 4 pi 探测器阵列进行核结构研究

• 批准号: 0244847
• 负责人: Douglas Cline
• 金额: --
• 依托单位: University of Rochester
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-01 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0244847&HistoricalAwards=false
• 关键词: Nuclear; Structure; Studies; pi; Detector

The proposed research program exploits the Rochester 4p heavy-ion detector CHICO, plus Gammasphere, this nation's premier high-resolution gamma-ray facility, at heavy-ion beam facilities in order to probe the structure of nuclei at high angular momentum as well as far from stability. The Yale-Rochester YRAST gamma-ray detector array, which is coupled to the Yale 20MV tandem accelerator, will be used to complement the proposed research program at Gammasphere. The developments of CHICO, contributions to Gammasphere, and the techniques of Coulomb excitation, heavy-ion induced transfer, and fission-fragment spectroscopy, are the culmination of many years of effort at Rochester. These are used to study collective modes of motion in nuclei, to probe single-particle and pairing degrees of freedom and to explore exotic neutron-rich nuclei far from stability. The research has applications such as the planned studies of exotic metastable (isomeric) states in nuclei may provide a means of using stimulated isomer decay for energy storage or for building gamma-ray lasers. Cline will continue to be involved in the development of the next generation high-resolution gamma-ray detector technology that employs the new concept of tracking the location and energy of every gamma-ray interaction. Such detectors will provide a resolving power that is orders of magnitude better than currently available, enabling studies that at present are inaccessible to nuclear science. Besides having an enormous impact on nuclear science, the potential impact of such gamma-ray tracking and imaging detectors will be considerable to a wide range of applications, including astrophysics, medicine, industry, and nuclear safeguards. The proposed research program will be an ideal environment for graduate and post-doctoral education.

拟议中的研究计划利用罗切斯特4 p重离子探测器CHICO，加上Gammasstrom，这个国家首屈一指的高分辨率伽马射线设施，在重离子束设施，以探测原子核的结构在高角动量以及远离稳定。耶鲁-罗切斯特YRAST伽马射线探测器阵列，这是耦合到耶鲁大学20 MV串列加速器，将被用来补充拟议的研究计划在Gammasstrom。CHICO的发展、对γ射线的贡献、库仑激发技术、重离子诱导转移技术和裂变碎片光谱学，都是罗切斯特多年努力的结晶。它们被用来研究原子核的集体运动模式，探测单粒子和配对自由度，以及探索远离稳定的奇异富中子核。这项研究有一些应用，例如计划对原子核中的奇异亚稳（异构）状态进行研究，这可能提供一种利用受激异构衰变进行能量储存或建造伽马射线激光器的手段。克莱恩将继续参与下一代高分辨率伽马射线探测器技术的开发，该技术采用跟踪每一次伽马射线相互作用的位置和能量的新概念。这种探测器将提供比现有探测器好几个数量级的分辨能力，使核科学目前无法进行的研究成为可能。除了对核科学产生巨大影响外，这种伽马射线跟踪和成像探测器的潜在影响将在广泛的应用中相当大，包括天体物理学，医学，工业和核保障措施。拟议的研究计划将是研究生和博士后教育的理想环境。