MRI-R2: Acquisition of a Wavelength Dispersive X-ray Fluorescence Spectrometer

MRI-R2：波长色散 X 射线荧光光谱仪的采集

• 批准号: 0959807
• 负责人: Tarek Abdel-Fattah
• 金额: $ 25.3万
• 依托单位: Christopher Newport University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-01-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0959807&HistoricalAwards=false
• 关键词: MRI; R2; Acquisition; Wavelength; Dispersive

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).With this award from the Major Research and Instrumentation (MRI) program, Tyler A. Sullens and his colleagues Tarek Abdel-Fattah, Kathleen E. Brunke and Lauren Ruane will acquire a Wavelength Dispersive X-ray Fluorescence Spectrometer (WDXRF). It will support the Center for Coastal, Environmental, and Atmospheric Studies (C2EAS) at the university. The following areas of research will be impacted: a) fate of fissionable material in plant and soil environments, b) elemental characterization of atmospheric aerosols, c) effects of mycorrhizal fungi on metal accumulation in plants, d) development of nanomaterials for the absorption of heavy metals from contaminated soils, e) remediation of contaminated soils and air: detecting and quantifying heavy metals on military sites (focus: lead), f) preservation and restoration of marine artifacts, and, g) uptake efficiency and fate of metals in a created wetland.Wavelength dispersive X-ray fluorescence (WDXRF) spectroscopy enables researchers to obtain elemental analysis of materials through non-destructive means. X-rays irradiate a sample causing core electrons from atoms to be promoted to higher energy orbitals. The relaxation of these electrons results in emission (fluorescence) of secondary X-rays characteristic of the element. Since this will be the only regional WDXRF facility in SE Virginia, it will be made available to other research institutions in the area (Hampton University, Elizabeth City State University, Norfolk State University, Old Dominion University, and College of William and Mary, NASA, Jefferson Laboratory National Accelerator Facility).

该奖项是根据2009年《美国复苏和再投资法案》(Public Law 111-5)获得的。在重大研究和仪器(MRI)计划的这一奖项下，泰勒·A·苏伦斯及其同事塔里克·阿卜杜勒-法塔赫、凯瑟琳·E·布伦克和劳伦·鲁恩将获得一台波长色散X射线荧光光谱仪(WDXRF)。它将支持该大学的海岸、环境和大气研究中心(C2EAS)。下列研究领域将受到影响：a)可裂变物质在植物和土壤环境中的去向，b)大气气溶胶的元素特征，c)菌根真菌对植物中金属积累的影响，d)用于从受污染土壤中吸收重金属的纳米材料的开发，e)受污染土壤和空气的修复：在军事场所检测和量化重金属(焦点：铅)，f)海洋文物的保护和修复，以及g)在创建的湿地中金属的吸收效率和去向。波长色散X射线荧光(WDXRF)光谱使研究人员能够通过非破坏性手段获得材料的元素分析。X射线照射样品，导致原子中的核心电子被提升到更高的能量轨道。这些电子的驰豫导致这种元素特有的二次X射线的发射(荧光)。由于这将是弗吉尼亚州东南部唯一的地区性WDXRF设施，该地区的其他研究机构(汉普顿大学、伊丽莎白城州立大学、诺福克州立大学、老多米尼恩大学、威廉与玛丽学院、美国宇航局、杰斐逊实验室国家加速器设施)都将使用它。