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约翰逊这项由美国国家科学基金会颁发的奖项将支持对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由紫外线辐射、电子和离子在太阳系外的大小天体(特别是彗星、卫星、行星环)表面诱导的类似过程。还将研究辐照样品的热升华速率的影响。这项研究包括用数值模拟来解释实验室的测量结果，预计将有助于更好地理解溅射引起的物理和化学变化。这一理解对于解释太阳系天体以及星际介质(即星际颗粒)的观测数据至关重要。预计这项研究将非常富有成效，因为研究人员的技能和出色的过去表现，他们最先进的实验室设施，以及目前在这一研究领域缺乏可靠的数据。