US-Sweden Cooperative Research: Ion Beam Desorption of Molecular Solids

美国-瑞典合作研究：分子固体的离子束解吸

• 批准号: 8923014
• 负责人: Robert Johnson
• 金额: $ 1.53万
• 依托单位: University of Virginia Main Campus
• 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: 1990-07-15 至 1993-07-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8923014&HistoricalAwards=false
• 关键词: US; Sweden; Cooperative; Research; Ion

This award will support cooperative research in solid state physics, involving Drs. R.E. Johnson and J.W. Boring, University of Virginia and Dr. B.U. Sundquist, Tandem Accelerator Laboratory, University of Uppsala, Sweden. The objective of the project is to describe the common mechanisms for electrical-induced desorption and modification of a variety of organic materials and molecular insulators. The US investigators have been carrying out a theoretical program on modeling the electronic and chemical processes which are initiated when an ion penetrates insulating materials, as well as an experimental program for electron and keV ion modification of such materials. A primary effort has been the study of low- temperature, molecular condensed gases. Dr. Sundquist's research group at Uppsala, using the tandem accelerator and recently acquired lasers, has been studying MeV ion and laser-induced desorption of large biological molecules from samples of condensed molecules as a unique means of mass determination. They have also been studying modification of certain electronic insulators with the tandem accelerator. In the next few years they will have the ability to irradiate with very high energy particles using the new accelerator which was built at Uppsala. The US and Swedish efforts have concentrated on describing the principal energy ejection processes which occur in the bulk; however, they have begun to describe the common energy transfer processes occuring in molecular solids. In the proposed collaboration the two groups will study organic solids; the experiments performed by the two groups will be coordinated in order to expose the common aspects of the physical and chemical mechanisms. The project will benefit from the recently-added capabilities of the Uppsala group to study neutral biomolecule ejection and laser desorption and of the ability of Virginia group to make complementary measurements on chemically similar samples. Results of this research will be of interest in a number of scientific areas, such as biophysics, astrophysics, electronics and pharmaceuticals.

该奖项将支持涉及DRS的固态物理学的合作研究。关于。约翰逊和J.W.无聊，弗吉尼亚大学和B.U.博士Sundquist，瑞典乌普萨拉大学串联加速器实验室。 该项目的目的是描述电气诱导的解吸和修饰各种有机材料和分子绝缘子的常见机制。 美国研究人员一直在进行一个理论计划，以建模当离子穿透绝缘材料以及对这些材料的电子和KEV离子修饰的实验程序时，该计划是启动的。 主要的努力是研究低温，分子冷凝气体。 uppsala的Sundquist研究小组使用串联加速器并最近获得的激光研究，一直研究MEV离子和激光诱导的从浓缩分子样品中对大型生物分子的解吸，这是一种独特的质量测定手段。 他们还一直在研究使用串联加速器对某些电子绝缘子的修饰。 在接下来的几年中，他们将使用在乌普萨拉（Uppsala）建造的新加速器使用非常高的能量颗粒照射。美国和瑞典的努力集中在描述大量发生的主要能量弹出过程。但是，他们已经开始描述分子固体中发生的常见能量转移过程。 在拟议的合作中，这两个小组将研究有机固体。两组进行的实验将进行协调，以揭示物理和化学机制的共同方面。 该项目将受益于Uppsala组最近增强的能力研究中性生物分子射血和激光解吸以及弗吉尼亚组对化学相似样品进行互补测量的能力。这项研究的结果将在许多科学领域（例如生物物理学，天体物理学，电子和药物）中引起人们的关注。