Electron Impact Excitation and Ionization of Atmospheric Species

大气物质的电子碰撞激发和电离

• 批准号: 9222344
• 负责人: John Doering
• 金额: $ 36.2万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-15 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9222344&HistoricalAwards=false
• 关键词: Electron; Impact; Excitation; Ionization; Atmospheric

This proposal requests support to study laboratory electron excitation cross sections and develop a new method for the study of ionization-excitation branching ratios for atmospheric species. Electron excitation and ionization of atmospheric constituents takes place in the atmospheres of Earth, the major planets and certain of their satellites, and objects such as comets. Knowledge of the electron impact and ionization processes is necessary to understand how rapidly electrons lose energy in aeronomical processes as well as what specific excitations they produce. During the period of the proposed grant, the atomic nitrogen and oxygen cross section sets will be obtained using a new type of atomic source currently under development and complete measurements on ionization branching ratios for N2 and other species will be carried out. It will be possible to provide a large amount of new cross section data to the aeronomy community as a result of work on this grant.

这项提议要求支持研究实验室电子激发截面，并开发一种研究大气物种电离-激发分支比的新方法。大气成分的电子激发和电离发生在地球、主要行星及其某些卫星以及彗星等天体的大气层中。了解电子碰撞和电离过程对于理解电子在航空过程中能量损失的速度以及它们产生的具体激发是必要的。在拟议的赠款期间，将使用目前正在开发的一种新型原子源获得氮原子和氧原子的截面集，并将对氮和其他物种的电离分支比进行完整的测量。由于这笔赠款的工作，将有可能向空气动力学社区提供大量新的横截面数据。