RUI: Nuclear Physics Research with Undergraduate Students

RUI：本科生核物理研究

• 批准号: 2011267
• 负责人: Shelly Lesher
• 金额: $ 22.5万
• 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: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2011267&HistoricalAwards=false
• 关键词: RUI; Nuclear; Physics; Research; Undergraduate

Nuclei are the basic building blocks of matter and understanding their fundamental properties is the main goal of this award. The PI and her team of undergraduate students will use the newly developed La Crosse fIREBAll detector system, located at the University of Notre Dame’s Nuclear Science Laboratory, to measure conversion electrons in the Erbium-166 nucleus. This information will be combined with previous data to address an open question in nuclear physics about how or if nuclei vibrate. This research program will involve the University of Wisconsin – La Crosse undergraduate students early in their scientific career in publishable research through detector development, data analysis, and collaborative projects. The students will present their work at national conferences, be involved in writing results in peer-reviewed papers, and acquire skills important for the next generation of scientists.Nuclei show some emergent collective behavior across isotopic and isobaric chains and are known to be deformed in shape in regions of the chart of nuclides away from closed shell. This award will investigate the vibrational degrees of freedom superimposed on the deformed ground states and the expected rotational excited states built upon them. The PI and her team of undergraduate students aim to determine the characteristics of excited state by the measurement of conversion electrons in coincidence with gamma rays, using the only array of its kind in the US. At the University of Wisconsin-La Crosse students will also work on High Purity Germanium (HPGe) detectors in a small local laboratory. All experiments will be performed, analyzed, and disseminated in collaboration with UWL undergraduate students.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

原子核是物质的基本组成部分，了解它们的基本性质是该奖项的主要目标。PI和她的本科生团队将使用位于圣母大学核科学实验室新开发的拉克罗斯火球探测器系统来测量铒-166核中的转换电子。这些信息将与以前的数据相结合，以解决核物理学中关于原子核如何或是否振动的一个悬而未决的问题。该研究项目将涉及威斯康辛大学拉克罗斯分校的本科生，通过探测器开发、数据分析和合作项目，在他们的科学生涯早期进行可发表的研究。这些学生将在国家会议上展示他们的研究成果，参与撰写同行评议的论文，并获得对下一代科学家至关重要的技能。原子核在同位素链和等压链上显示出一些紧急的集体行为，并且已知在核素图中远离闭壳的区域形状是变形的。该奖项将研究叠加在变形基态上的振动自由度以及建立在它们之上的预期旋转激发态。PI和她的本科生团队的目标是通过测量与伽马射线重合的转换电子来确定激发态的特征，使用美国唯一的这种阵列。在威斯康星大学拉克罗斯分校，学生们还将在当地的一个小实验室里研究高纯锗（HPGe）探测器。所有的实验都将与UWL的本科生合作进行、分析和传播。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Lifetime measurements of 0+ states in Er168 with the Doppler-shift attenuation method

使用多普勒频移衰减法测量 Er168 中 0 态的寿命

• DOI: 10.1103/physrevc.106.044302
• 发表时间: 2022
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Lesher, S. R.;Aprahamian, A.;Lee, K.;Alemayehu, B.;Clark, L. M.;James, X.;Lowrie, J. C.;Meier, M.;McEwan, L.;Mukhopadhyay, S.
• 通讯作者: Mukhopadhyay, S.