RUI: Hyperfine Structure Effects in Hydrogen Atom Collisions (Physics)

RUI：氢原子碰撞中的超精细结构效应（物理）

• 批准号: 9013364
• 负责人: Stuart Crampton
• 金额: $ 17.07万
• 依托单位: Williams College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-15 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9013364&HistoricalAwards=false
• 关键词: RUI; Hyperfine; Structure; Effects; Hydrogen

Experimental tests of the theory of spin exchange collisions in ground state hydrogen, including hyperfine effects, will be performed. Measurements of hyperfine induced frequency shift cross sections will be made near .5 Kelvin in collaboration with the University of British Columbia using their supercooled hydrogen maser. The same measurements but at 10 Kelvin will be performed at Williams College using the apparatus developed during the previous grant. The results will test the theoretical treatment of low energy atomic collisions to the degree to which collisions between hydrogen atoms may limit the stability of cryogenic hydrogen maser frequency standards.

自旋交换理论的实验检验 基态氢的碰撞，包括超精细 效果，将被执行。 超精细诱导的测量 频移横截面将在0.5开尔文附近， 与不列颠哥伦比亚省大学合作， 他们的过冷氢脉泽 相同的测量，但在 10开尔文将在威廉姆斯学院使用 在上一次授予期间开发的设备。 结果将 测试低能原子碰撞的理论处理， 氢原子之间的碰撞限制了 低温氢脉泽频率标准的稳定性。