US-Austria Cooperative Research: Comparison of Photons-, Electron-, and Ion-Induced Desorption from Surfaces

美国-奥地利合作研究：光子、电子和离子诱导表面解吸的比较

• 批准号: 8912957
• 负责人: Norman Tolk
• 金额: $ 1.59万
• 依托单位: Vanderbilt University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-01-01 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8912957&HistoricalAwards=false
• 关键词: US; Austria; Cooperative; Research; Comparison

This award supports Professors Norman Tolk and Royal Albridge, Jr., of Vanderbilt University to continue their productive collaboration in experimental surface physics with Professors Wolfgang Husinsky and Gerhard Betz of the Institute of General Physics of the Technical University of Vienna, Austria. They are carrying out cooperative investigations of the microscopic electronic mechanisms responsible for the final states of particles which are emitted from surfaces due to bombardment of photons, electrons and ions. Their goal is to gain basic understanding of the way in which energy from directed beams may be absorbed, electronically localized and ultimately transformed at various surfaces into internal and kinetic energies of the emitted particle. The Viennese group is a world leader in the detection and characteri- zation of sputtered particles produced by ion-surface collisions using optical techniques, in particular, laser-induced fluorescence. The Vanderbilt group has been studying the strictly electronic desorption processes associated with electron and UV photon bombardment of solid surfaces. Through collaboration, they have demonstrated that it is possible using laser-induced fluorescence techniques to identify specific excitonic and defect channels through which incident beam energy flows as it breaks bonds in the surface and near-surface bulk in pure crystalline materials. They have also begun studies of the effect of thin adsorbed layers on desorption induced by electronic transitions.

该奖项支持范德比尔特大学的Norman Tolk教授和Royal Albridge， Jr.教授与奥地利维也纳技术大学普通物理研究所的Wolfgang Husinsky教授和Gerhard Betz教授继续在实验表面物理方面进行富有成效的合作。由于光子、电子和离子的轰击，从表面发射出粒子的最终状态，他们正在进行微观电子机制的合作研究。他们的目标是对定向光束的能量如何被吸收、电子定位并最终在不同表面转化为发射粒子的内部和动能的方式获得基本的理解。维也纳小组在使用光学技术，特别是激光诱导荧光，检测和表征离子表面碰撞产生的溅射粒子方面处于世界领先地位。范德比尔特大学的研究小组一直在研究与固体表面的电子和紫外光子轰击有关的严格的电子脱附过程。通过合作，他们已经证明了使用激光诱导荧光技术来识别特定的激子和缺陷通道是可能的，当入射光束在纯晶体材料的表面和近表面体中破坏键时，可以通过这些通道流动。他们也开始研究薄吸附层对电子跃迁引起的解吸的影响。