Irradiation of Condensed Gas Solids: Physical Mechanisms and Astrophysical Implications

凝结气体固体的辐照：物理机制和天体物理意义

• 批准号: 9801928
• 负责人: Robert Johnson
• 金额: $ 15.32万
• 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: 1998
• 资助国家: 美国
• 起止时间: 1998-05-15 至 2002-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9801928&HistoricalAwards=false
• 关键词: Irradiation; Condensed; Gas; Solids; Physical

Robert Johnson University of Virginia Dr. Robert Johnson, University of Virginia, will continue a study of the effects of ion bombardment and ultraviolet radiation on low temperature solid surfaces. Sputtering of ices is a process that has proved to be important in determining the reflectance of the icy satellites of planets in the Solar System. There now exist a large body of laboratory data on the sputtering of ices. This data set has some inconsistencies and large gaps in the materials, incident particles, and particle energies studied. Dr. Johnson will calculate complete data sets for those ices that are critical to the understanding of the surfaces of outer Solar System objects. He will also calculate how these data can be applied to icy satellite regoliths that have grain sizes and porosities much different from those in laboratory studies. The data will be used on the production of molecular oxygen and hydrogen to quantitatively test the various solid-state chemistry models that have been proposed for the production and desorption of new volatiles during irradiation of ice.

弗吉尼亚大学罗伯特·约翰逊大学（Robert Johnson University）弗吉尼亚大学的罗伯特·约翰逊（Robert Johnson）博士将继续研究离子轰击和紫外线辐射对低温固体表面的影响。 ICES的溅射是一个事实证明，它在确定太阳系中行星冰卫星的反射率方面很重要。 现在有大量有关溅射的实验室数据。 该数据集在研究的材料，入射颗粒和粒子能量中有一些不一致和较大的差距。 约翰逊博士将计算那些对理解外太阳系对象表面至关重要的冰的完整数据集。 他还将计算如何将这些数据应用于具有与实验室研究中的晶粒大小和毛孔的冰冷卫星岩石。 数据将用于生产分子氧和氢，以定量测试在冰辐射过程中已提出的各种固态化学模型，这些模型已提出了用于生产和解吸新挥发物的。