Anapole Moment Studies in Francium

钫的阿纳波矩研究

• 批准号: 1307536
• 负责人: Luis Orozco
• 金额: $ 60万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1307536&HistoricalAwards=false
• 关键词: Anapole; Moment; Studies; Francium

Nature has intrinsic handedness because of the weak interaction, but the difference between the left- and right-handed cases is barely discernible in atomic and nuclear interactions. Understanding its strength in nuclei is possible through measurements that require francium atoms so cold that they barely move. They show the effects of the handedness, from the anapole moment, when they are set to oscillate, and their frequency of oscillation changes with the handedness. The researchers will study the weak interaction, the force responsible for the beginning of the solar cycle, inside the francium nucleus. The atoms, made in the accelerator at TRIUMF Vancouver Canada, will be held on a laser trap, excited with microwaves and generate signals that show the handedness of nature.This international effort, with active participants from the USA, Canada, and Mexico, as well as Australia and China, is an example of multinational collaboration that is enabling investigations at the frontier of physics. The research will allow US graduate and undergraduate students to obtain valuable global perspectives in science, and be educated in the boundary between atomic molecular and optical physics and nuclear physics. In addition, undergraduates from Mexico, through a program with the Sociedad Mexicana de Fisica, will participate in the summer at TRIUMF. The recently commissioned Francium Trapping Facility at TRIUMF is available for visits by the general public.

由于相互作用较弱，自然界具有固有的旋向性，但在原子和核相互作用中，左旋和右旋情况之间的差异几乎无法辨别。通过测量钫原子的温度来了解它在原子核中的强度是可能的，钫原子必须冷到几乎无法移动。当它们被设置为振荡时，它们显示了从阿纳极矩开始的旋手性的影响，并且它们的振荡频率随着旋手性而变化。研究人员将研究钫核内部的弱相互作用，即导致太阳周期开始的力。这些原子是在加拿大温哥华 TRIUMF 加速器中制造的，将被放置在激光阱上，用微波激发并产生显示自然旋向性的信号。这项国际努力有来自美国、加拿大、墨西哥、澳大利亚和中国的积极参与者，是跨国合作的一个例子，促进了物理学前沿的研究。该研究将使美国研究生和本科生获得宝贵的全球科学视角，并接受原子分子、光学物理和核物理之间边界的教育。此外，来自墨西哥的本科生将通过 Sociedad Mexicana de Fisica 的项目参加 TRIUMF 的暑期活动。 TRIUMF 最近投入使用的钫捕获设施可供公众参观。