Irradiation of Condensed Gases: Physical Mechanisms and Astrophysical Implications

凝聚态气体的辐照：物理机制和天体物理意义

• 批准号: 9419501
• 负责人: Robert Johnson
• 金额: $ 20.18万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-03-15 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9419501&HistoricalAwards=false
• 关键词: Irradiation; Condensed; Gases; Physical; Mechanisms

94-19501 Johnson This award by NSF will support laboratory measurements of sputtering from surfaces of a range of materials. Sputtering from these materials simulates similar processes, induced by UV radiation, electrons, and ions, on the surfaces of small and large bodies in the outer solar system (in particular, comets, satellites, planetary rings). Effects of thermal sublimation rates of the irradiated samples will also be studied. The research, which includes numerical modeling to interpret the laboratory measurements, is expected to lead to an improved understanding of the physical and chemical changes caused by sputtering. This understanding will be crucial for interpreting observational data of bodies in the solar system as well as of the interstellar medium (i.e., interstellar grains). It is expected that the research will be exceptionally productive because of the investigators' skills and outstanding past performance, their state-of-the-art laboratory facility, and the current dearth of reliable data in this research area.

94-19501 Johnson由NSF获得该奖项，将支持从一系列材料表面溅射的实验室测量。 这些材料的溅射模拟了类似的过程，这些过程是由紫外线辐射，电子和离子引起的，在外部太阳系中的小物体和大物体的表面上（尤其是彗星，卫星，行星环）。还将研究受辐照样品的热升华速率的影响。 这项研究包括用于解释实验室测量的数值建模，预计将导致人们对溅射引起的物理和化学变化的理解。 这种理解对于解释太阳系和星际介质（即星际晶粒）中物体的观察数据至关重要。 预计，由于研究人员的技能和出色的表现，最先进的实验室设施以及该研究领域可靠数据的当前缺乏，这项研究将非常有生产力。