RUI: Precise Atomic Structure Measurements and Tests of Fundamental Physics

RUI：精确的原子结构测量和基础物理测试

基本信息

批准号：
0140189
负责人：
Protik Majumder
金额：
$ 23.02万
依托单位：
Williams College
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2002
资助国家：
美国
起止时间：
2002-07-01 至 2006-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0140189&HistoricalAwards=false
关键词：
RUI Precise Atomic Structure Measurements

项目摘要

This project consists of a series of relatively small-scale experiments using lasers and atoms which will address fundamental questions about physics of the electroweak interaction as well as other possible symmetry-violating interactions. Recent atomic parity nonconservation (PNC) experiments in several elements have attained very high precision. However, before new experimental results can lead to fundamental insights, the effects of the complex atomic structure of the relevant atoms must be understood. In thallium, new atomic structure calculations presently underway have the potential to make this element a particularly important system for testing electroweak physics. Recently completed transition amplitude, and hyperfine splitting measurements, as well as Stark shift and Stark-induced amplitude measurements now underway in our laboratory provide some of the first high-precision atomic structure tests in this element. Experiments using very similar techniques will be undertaken in other atomic systems of potential importance to electroweak tests such as lead. These experiments make use of diode laser systems and thallium samples in heated vapor cells as well as an atomic beam apparatus. The experiments will serve as ideal research training for undergraduate physics majors, the large majority of whom attend graduate school in the physical sciences.

该项目由一系列使用激光和原子的相对小规模的实验组成，这些实验将解决有关电弱相互作用以及其他可能的对称破坏相互作用的物理基本问题。最近的几种元素的原子宇称不守恒（PNC）实验已经达到了非常高的精度。然而，在新的实验结果产生基本见解之前，必须了解相关原子的复杂原子结构的影响。对于铊，目前正在进行的新原子结构计算有可能使该元素成为测试电弱物理的特别重要的系统。最近完成的跃迁振幅和超精细分裂测量，以及我们实验室正在进行的斯塔克位移和斯塔克诱导振幅测量，为该元素提供了一些首次高精度原子结构测试。使用非常相似的技术的实验将在对弱电测试具有潜在重要性的其他原子系统（例如铅）中进行。这些实验利用二极管激光系统和加热蒸汽室中的铊样品以及原子束装置。这些实验将为物理学专业的本科生提供理想的研究训练，其中绝大多数就读于物理科学研究生院。