RUI - Research with Undergraduates on Rare-Earth Nuclei

RUI - 与本科生一起进行稀土原子核研究

• 批准号: 1713816
• 负责人: Shelly Lesher
• 金额: $ 16.8万
• 依托单位: University of Wisconsin-La Crosse
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-15 至 2021-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1713816&HistoricalAwards=false
• 关键词: RUI; Research; Undergraduates; Rare; Earth

The visible universe is heavily composed of nuclei made up of neutrons and protons in a wide range of configurations born through the burning of stars and even explosive astronomical events. The nuclei and their configurations are determined by the underlying nuclear properties of matter, and determining those properties allows better understanding of how the known and soon to be known nuclei came to exist. One way to study the properties of nuclei is by exciting and de-exciting the nuclear system. This award supports research that will focus on analyzing the lifetimes of the quantum states in deformed nuclei to better understand the way nuclei interact collectively. More specifically, the experiments will use beams of neutrons that impinge on a nucleus to excite it, and then detect the scattered neutron and the energy that is given off when the nucleus de-excites. This project will also contribute to training the next generation of scientists by actively engaging undergraduate students in research at the University of Wisconsin La Crosse (UWL).The nature of low-lying excitations, K^{pi} = 0+ bands in deformed nuclei remain enigmatic in the field. This project focuses on the search for vibrational excitations in deformed nuclei, using the (n,n' gamma) reaction. The University of Wisconsin-La Crosse Nuclear Science Group will also conduct detector development during the academic year in a small local laboratory. The results will be broadly disseminated through publications and conference presentations by the PI and undergraduate researchers.

可见的宇宙主要由中子和质子组成的原子核组成，这些原子核具有各种各样的结构，这些结构是通过恒星燃烧甚至爆炸性天文事件产生的。 原子核及其构型是由物质的基本核性质决定的，确定这些性质可以更好地理解已知的和即将被发现的原子核是如何存在的。 研究原子核性质的一种方法是对原子核系统进行激发和去激发。该奖项支持的研究将侧重于分析变形原子核中量子态的寿命，以更好地理解原子核集体相互作用的方式。 更具体地说，实验将使用中子束撞击原子核以激发它，然后检测散射的中子和原子核去激发时释放的能量。 该项目还将通过积极吸引威斯康星州大学拉克罗斯（UWL）的本科生参与研究，为培养下一代科学家做出贡献。 这个项目的重点是利用（n，n'伽马）反应在变形核中寻找振动激发。威斯康星大学拉克罗斯核科学小组也将在一个小型的当地实验室进行探测器的开发。研究结果将通过PI和本科生研究人员的出版物和会议报告广泛传播。

项目成果

Low lying oscillations of deformed nuclei

• DOI: 10.1051/epjconf/201817802009
• 发表时间: 2018-05
• 作者: A. Aprahamian;S. Lesher

Lifetime measurements in Gd156

• DOI: 10.1103/physrevc.98.034303
• 发表时间: 2018-09
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: A. Aprahamian;R. D. Haan;S. Lesher;C. Casarella;A. Stratman;H. Börner;H. Lehmann;M. Jentschel;A. Bruce