MRI: Acquisition of an Alpha Spectrometry System for Research and Undergraduate Training in Geology and Environmental Science

MRI：采购阿尔法能谱测量系统，用于地质学和环境科学的研究和本科生培训

• 批准号: 0115704
• 负责人: Rhawn Denniston
• 金额: $ 9.78万
• 依托单位: Cornell College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-15 至 2002-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0115704&HistoricalAwards=false
• 关键词: MRI; Acquisition; Alpha; Spectrometry; System

0115704DennistonThis grant, made through the Major Research Instrumentation (MRI) Program, provides full support of the costs of acquiring a bank of alpha spectrometers for uranium-series (238U-234U-230Th and 226Ra-210Pb) isotope dating of speleothems and corals. The equipment will include a Canberra Genie-2000 benchtop alpha analyst with dual alpha spectrometers, 450 mm2 PIPS detectors, hardware and software for operation and data reduction, as well as a radon analysis system composed of Storm King R-LPSS double Rn extraction system with an Applied Techniques model AC/DC-DRC-MK10-2 dual radon counting system. Acquisition of this instrument will enable two lines of research in earth systems processes at Cornell College, including the impacts of environmental change on continental and shallow marine environments: (1) construction of speleothem-based records of Holocene climate variability from the midwestern U.S.A. and central Nepal and (2) analysis of the temporal resolving power of reef coral death assemblages as a means of assessing the response of reef coral communities to global climate change. Both research areas will be addressed as faculty and faculty-guided undergraduate projects that will be combined with stable and radiogenenic isotope mass spectrometric analyses at the University of Iowa and the University of New Mexico. The research experiences students receive using this alpha spectrometry system will enhance quantitative and analytical skills, expand appreciation for independent research as a tool for scientific training, introduce a variety of environmentally-oriented research topics, and develop peripheral skills including X-ray diffraction and optical microscope methods, stable isotopic analysis, and thermal ionization mass spectrometry.***

0115704丹尼斯顿这项拨款是通过主要研究仪器 (MRI) 计划提供的，为购买一组用于对洞穴和珊瑚进行铀系列（238U-234U-230Th 和 226Ra-210Pb）同位素测年的 α 光谱仪的费用提供全额支持。 该设备将包括配备双 α 光谱仪的 Canberra Genie-2000 台式 α 分析仪、450 mm2 PIPS 探测器、用于操作和数据缩减的硬件和软件，以及由 Storm King R-LPSS 双 Rn 提取系统组成的氡分析系统， Applied Techniques 型号 AC/DC-DRC-MK10-2 双氡气计数系统。 获得该仪器将使康奈尔学院能够进行地球系统过程的两条研究方向，包括环境变化对大陆和浅海环境的影响：(1) 构建基于洞穴的美国中西部和中部全新世气候变化记录尼泊尔和（2）对珊瑚礁珊瑚死亡组合的时间分辨能力进行分析，作为评估珊瑚礁珊瑚群落对全球气候变化的响应的手段。 这两个研究领域都将作为教师和教师指导的本科项目来解决，这些项目将与爱荷华大学和新墨西哥大学的稳定和放射性同位素质谱分析相结合。 学生使用该 α 光谱测量系统获得的研究经验将增强定量和分析技能，扩大对独立研究作为科学培训工具的认识，介绍各种以环境为导向的研究主题，并发展外围技能，包括 X 射线衍射和光学显微镜方法、稳定同位素分析和热电离质谱分析。***