Collisions of Electrons with Metastable Atoms of Rare Gases

电子与稀有气体亚稳态原子的碰撞

• 批准号: 0553211
• 负责人: Chun Lin
• 金额: $ 12万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-15 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0553211&HistoricalAwards=false
• 关键词: Collisions; Electrons; Metastable; Atoms; Rare

This project focuses on electron excitation out of metastable levels of xenon atoms. The investigators will measure electron-impact excitation cross sections out of the metastable levels of xenon into the higher levels. The experimental efforts consist of two parts. The first part is to construct a metastable-atom-beam target. An atomic beam extracted from an ordinary hollow cathode discharge contains metastable atoms, but the density of metastable atoms needed for the experiment is insufficient for the purpose. Therefore part of the atoms in a second metastable level will be transferred into the desired level by laser pumping. In the second part of the experiment an electron beam will be passed through the metastable atoms exciting them to higher levels, and the fluorescence from these higher levels will be utilized to determine the excitation cross sections. The broader impact of the program involves student education as well as efforts in diversity.

该项目的重点是从氙原子的亚稳态水平激发电子。研究人员将测量从氙的亚稳态能级到更高能级的电子撞击激发截面。实验工作包括两部分。 第一部分是构建亚稳态原子束靶。从普通空心阴极放电中提取的原子束含有亚稳态原子，但实验所需的亚稳态原子密度不足以达到目的。因此，第二亚稳态能级的部分原子将通过激光泵浦转移到所需的能级。在实验的第二部分中，电子束将穿过亚稳态原子，将它们激发到更高的能级，并且来自这些更高能级的荧光将用于确定激发截面。 该计划更广泛的影响涉及学生教育以及多元化方面的努力。