Probing Nuclear Sturcture with Fast Neutrons

用快中子探测核结构

• 批准号: 9803784
• 负责人: Steven Yates
• 金额: $ 69.55万
• 依托单位: University of Kentucky Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-01 至 2002-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9803784&HistoricalAwards=false
• 关键词: Probing; Nuclear; Sturcture; Fast; Neutrons

The research of the nuclear structure group at the University of Kentucky is focused on related topics in nuclear spectroscopy, neutron-induced reactions, and neutron scattering. Neutron scattering experiments at the University's accelerator laboratory are designed to a) explore multiphonon vibrations in spherical and deformed nuclei, b) examine the role of fast electromagnetic transitions in the decay of collective excitations, c) provide data leading to more realistic models of nuclear level densities, d) address the separate roles of neutrons and protons in nuclear excitations, and e) expand our understanding of nuclear shell structure and the nature of nuclear shape transitions. Recently developed techniques to measure short lifetimes with the Doppler-shift attenuation method and to perform gamma-gamma coincidences following inelastic neutron scattering are crucial in many of these studies. A new research direction has been initiated to take advantage of the special opportunities provided by the development of the GEANIE array of gamma-ray detectors coupled with the spallation neutron source at the Los Alamos Neutron Scattering Center (LANSCE). With the high-energy neutrons from this facility, nuclei not readily produced by charged-particle reactions will be explored.

肯塔基大学核结构小组的研究重点是核光谱、中子诱发反应和中子散射等相关主题。 大学加速器实验室的中子散射实验旨在：a) 探索球形和变形核中的多声子振动，b) 检查快速电磁跃迁在集体激发衰变中的作用，c) 提供数据，得出更真实的核能级密度模型，d) 解决中子和质子在核激发中的单独作用，e) 扩展我们对核壳结构和核壳层结构的理解。 核形状转变的性质。 最近开发的利用多普勒频移衰减法测量短寿命以及在非弹性中子散射后执行伽马-伽马符合的技术在许多此类研究中至关重要。 一个新的研究方向已经启动，以利用伽马射线探测器 GEANIE 阵列与洛斯阿拉莫斯中子散射中心 (LANSCE) 散裂中子源的开发所提供的特殊机会。 利用该设施的高能中子，将探索带电粒子反应不易产生的原子核。