Electron and photon collision phenomena in atoms, molecules and clusters

原子、分子和团簇中的电子和光子碰撞现象

• 批准号: 6287-2009
• 负责人: McConkey, William
• 金额: $ 2.55万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=420221
• 关键词: Electron; photon; collision; phenomena; atoms

What are the mechanisms responsible for the "Northern Lights" ? What happens to the electrons which are released when X-rays or other high energy radiation enters our bodies ? How can laser cooling and atom traps be used to obtain data about collision processes in industrial plasmas ? How can beams of sulphur or oxygen atoms be produced and used to quantify processes occurring in planetary atmospheres ? In what ways do molecules like water break up when bombarded with electrons and what are the chances of getting particular fragments when they do ? How are molecular clusters different from gases or solids of the same material and how can they be used to shed light on problems of atmospheric pollution ? How can experimentalists and theoreticians work together best to establish accurate collision models ? These are just some of the questions that we will be trying to answer during the next grant period. To help accomplish this we plan a range of sophisticated experiments involving beams of electrons, light and a variety of targets. We will be using state-of-the-art techniques including laser cooling and trapping of atoms, unique metastable atom detection, and mass, optical and electron spectrometries. Many of the experiments are designed to provide accurate data for refinement of current theoretical ideas. Close collaboration will be maintained with other scientists doing related work in Canada and around the world. The research areas under consideration are at the forefront of world research in this field. Some are motivated by demands for information by high-technology industry. In addition to their fundamental importance, the data obtained will have significance for atmospheric and planetary physics, the aurora, plasma etching and deposition devices, radiation damage in biological materials and nanotechnology.

“北方之光”产生的机制是什么？ 当X射线或其他高能辐射进入我们的身体时，释放出的电子会发生什么变化？ 如何利用激光冷却和原子陷阱来获得工业等离子体中碰撞过程的数据？ 如何产生硫或氧原子束并用于量化行星大气中发生的过程？ 当受到电子轰击时，水等分子以何种方式分解？当它们分解时，获得特定碎片的可能性有多大？分子团簇与相同物质的气体或固体有何不同？它们如何用于揭示大气污染问题？ 实验学家和理论家如何才能最好地合作，建立准确的碰撞模型？ 这些只是我们在下一个赠款期内试图回答的一些问题。为了帮助实现这一目标，我们计划进行一系列复杂的实验，包括电子束、光束和各种目标。我们将使用最先进的技术，包括激光冷却和原子捕获，独特的亚稳态原子检测，以及质量，光学和电子光谱。许多实验的目的是提供精确的数据，完善目前的理论思想。将与在加拿大和世界各地从事相关工作的其他科学家保持密切合作。 正在审议的研究领域处于该领域世界研究的前沿。有些是出于高技术产业对信息的需求。所获得的数据除了具有根本重要性外，还将对大气和行星物理学、极光、等离子体蚀刻和沉积装置、生物材料的辐射损伤和纳米技术具有重要意义。