RUI: Undergraduate Research on Neutron-Rich Nuclei

RUI：富中子核的本科生研究

• 批准号: 1404236
• 负责人: Nathan Frank
• 金额: $ 12.38万
• 依托单位: Augustana College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-08-01 至 2018-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1404236&HistoricalAwards=false
• 关键词: RUI; Undergraduate; Research; Neutron; Rich

This award supports research at Augustana College (a small, undergraduate-only, liberal arts institution) to understand the structure of radioactive nuclei that have many excess neutrons. The National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University (MSU) produces radioactive beams with these excess neutrons. The beams are incident upon a target and the products of the nuclear reactions are measured in a variety of subatomic particle detectors. An important part of the project is the involvement of undergraduate students in these experiments and in development of the necessary detector instrumentation. Undergraduate research experience is important for many future technical careers as well as for graduate school. The funds for this award support the work of the undergraduates and the principle investigator to design and run experiments at NSCL, to analyze data, and to give talks and write papers on the results.Experiments on exotic nuclear systems are necessary to place constraints on modern theoretical models. The nuclei studied as part of this project are neutron-unbound, which means that a neutron is emitted from a nucleus shortly after formation. Since the nuclei are so unstable, the radioactive nuclear ion beam at NSCL is utilized for these experiments. The charged particle left over after neutron emission is bent by the Sweeper Magnet into a suite of charged particle detectors. The emitted neutron is detected by the MoNA-LISA (Modular Neutron Array and the Large-area multi-Institutional Scintillator Array). The research in this proposal involves data analysis of neutron-unbound nuclear systems and on-going equipment development. New data on the 24O(d,p) reaction will be taken to study negative parity states in 25O. The Augustana-MSU hodoscope, assembled, tested and installed by the Augustana nuclear group, is a key device for this experiment. In addition, the PI will work on the design, construction, and use of a new segmented target system for future experiments.

该奖项支持奥古斯塔纳学院（一个小型的，本科生，文科机构）的研究，以了解具有许多多余中子的放射性原子核的结构。 位于密歇根州立大学（MSU）的国家超导回旋加速器实验室（NSCL）用这些多余的中子产生放射性束。 束入射到目标上，核反应的产物在各种亚原子粒子探测器中被测量。 该项目的一个重要组成部分是本科生参与这些实验，并在必要的探测器仪器的发展。 本科研究经验对于许多未来的技术职业以及研究生院都很重要。 该奖项的资金支持本科生和主要研究者在NSCL设计和运行实验，分析数据，并就结果发表演讲和撰写论文。奇异核系统的实验是限制现代理论模型的必要条件。作为该项目的一部分，所研究的原子核是未结合中子的，这意味着中子在形成后不久就从原子核中发射出来。由于原子核是如此不稳定，在NSCL的放射性核离子束被用于这些实验。中子发射后留下的带电粒子被扫掠器磁铁弯曲成一套带电粒子探测器。发射的中子由MoNA-LISA（模块化中子阵列和大面积多机构闪烁体阵列）探测。本项目的研究内容包括中子束缚核系统的数据分析和正在进行的设备开发。24 O（d，p）反应的新数据将被用来研究25 O的负宇称态。Augustana-MSU hodoscope由Augustana核集团组装，测试和安装，是该实验的关键设备。 此外，PI将致力于设计，建造和使用一个新的分段目标系统，用于未来的实验。