A High Repetition Rate 193 nm Excimer Laser for the Production of Reactive Cold Molecules

用于生产反应性冷分子的高重复率 193 nm 准分子激光器

• 批准号: 423014-2012
• 负责人: Jaeger, Wolfgang
• 金额: $ 10.85万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=495883
• 关键词: Repetition; Rate; 193; nm; Excimer

Helium nanodroplet isolation spectroscopy has become a versatile tool for the stabilization and study of unstable species. Even more remarkable is the use of helium droplets as nanoreactors. For this purpose, helium nanodroplets, which consist of several thousand up to several million helium atoms, can be doped with reactive species. At the very low temperature of 400 mK, a chemical reaction will occur if it is barrier-less or through a tunnelling mechanism if a low barrier exists or it can be photo-induced. We have developed a promising research program to study chemical reactions of atmospheric and astrophysical relevance using the method of helium nanodroplet spectroscopy. Of particular interest to us are reactions involving the OH radical, which plays a particularly important role as Earth's atmospheric "vacuum cleaner".

氦纳米液滴分离光谱学已经成为稳定和研究不稳定物种的通用工具。更值得注意的是使用氦滴作为纳米反应器。为此，氦纳米液滴，其中包括几千到几百万氦原子，可以掺杂有活性物质。在400 mK的非常低的温度下，如果它是无势垒的，则将发生化学反应，或者如果存在低势垒，则通过隧穿机制发生化学反应，或者它可以是光诱导的。我们已经开发了一个很有前途的研究计划，研究化学反应的大气和天体物理学的相关性，使用氦纳米液滴光谱的方法。我们特别感兴趣的是涉及OH自由基的反应，OH自由基作为地球大气的“真空清洁器”发挥着特别重要的作用。