Penning Detachment: An Unstudied, Possibly Important Phenomena

潘宁支队：一种未经研究、可能很重要的现象

• 批准号: 9409105
• 负责人: R. Stephen Berry
• 金额: $ 35.46万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-08-01 至 1998-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9409105&HistoricalAwards=false
• 关键词: Penning; Detachment; Unstudied; Possibly; Important

In this project in the Experimental Physical Chemistry program of the Chemistry Division, R.S. Berry will study Penning detachment, a process in which a free, gaseous negative ion releases an electron as a result of a collision with an electronically excited neutral atom or molecule. The project is a collaboration of two institutions, The University of Chicago and the Heyrovsky Institute for Physical Chemistry in the Czech Republic. The Chicago experiments will be done with laser excitation of neutrals, while the Prague experiments will use electron impact excitation and subsequent electron energy analysis. Initially atomic ion and neutral collisions will establish the proof of principal. Later experiments will move to simple molecules as donors and targets. %%% The Penning detachment process, which is analogous to Penning ionization, is little studied but represents a new type of interaction between gas phase species which may play an important role in chemical vapor deposition or other plasma processes, such as take place in the upper atmosphere. As such, it has wide-ranging implications, from possibly improved manufacturing processes to a better understanding of ionospheric phenomena.

在化学系实验物理化学项目的这个项目中，R.S.贝里将研究潘宁脱离，这是一种自由气态负离子与电子激发的中性原子或分子碰撞而释放电子的过程。 该项目是芝加哥大学和捷克共和国海洛夫斯基物理化学研究所这两个机构的合作项目。 芝加哥实验将通过中性子的激光激发来完成，而布拉格实验将使用电子碰撞激发和随后的电子能量分析。 最初，原子离子和中性碰撞将建立原理证明。 稍后的实验将转向简单的分子作为供体和靶标。 %%% 潘宁分离过程类似于潘宁电离，很少被研究，但它代表了气相物质之间的一种新型相互作用，它可能在化学气相沉积或其他等离子体过程中发挥重要作用，例如发生在高层大气中的过程。 因此，它具有广泛的影响，从可能改进的制造工艺到更好地理解电离层现象。