Acquisition of a Dedicated Mass Spectrometer for TerrestrialNeon and Nitrogen Isotopic Studies

购买用于陆地氖气和氮同位素研究的专用质谱仪

• 批准号: 8709056
• 负责人: Harmon Craig
• 金额: $ 15.5万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-10-15 至 1989-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8709056&HistoricalAwards=false
• 关键词: Acquisition; Dedicated; Mass; Spectrometer; TerrestrialNeon

Funding is requested to acquire a mass spectrometer to be installed at the Scripps Institution of Oceanography. The spectrometer is to be dedicated to the analysis of the isotopes of neon and nitrogen, volatile species whose isotopic signatures in basalts, mantle-derived xenoliths, diamonds, ocean waters, stratospheric air, and polar ice cores are significant in the interpretation of the geochemical history of the Earth's mantle and the evolution of the crust, oceans and atmosphere. The proposed mass spectrometer uses a novel system of switching ion beams on its collectors to achieve essentially simultaneous triple collection for either masses 20, 21 and 22 (neon) or 28, 29 and 30 (nitrogen) to make possible the analysis of very small samples containing low concentrations of these isotopes.

要求提供资金，以购置一台质谱仪， 安装在斯克里普斯海洋研究所。的 光谱仪是专门用于分析的同位素 氖和氮的挥发性物质 玄武岩、幔源捕虏体、钻石、海洋沃茨 平流层空气和极地冰芯是重要的， 地幔地球化学史解释 以及地壳、海洋和大气的演化。的 所提出的质谱仪使用一种新颖的离子切换系统 在其收集器上的光束，以实现基本上同时 三次收集质量20、21和22（氖）或28， 29和30（氮），以使分析非常小的 含有低浓度同位素的样品。