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Studies of Electron Capture, Secondary Processes, and Photodetachment in High Pressure Ion Sources

Studies of Electron Capture, Secondary Processes, and Photodetachment in High Pressure Ion Sources
高压离子源中电子捕获、二次过程和光分离的研究
批准号:
9021330
负责人:
Eric Grimsrud
金额:
$10.03万
依托单位:
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
1990
资助国家:
美国
项目状态:
已结题
起止时间:
1990-12-01 至 1992-05-31

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中文摘要
翻译
这项研究,在分析和表面化学程序 化学部的,将研究电子捕获, 分子。 电子捕获在以下方面得到应用: 确定和量化某些类别的 分子,最突出的是含卤素的分子, 具有重要的生物和环境意义。 教授 格里姆斯鲁德的研究使用质谱法来观察 电子捕获过程和定量痕量污染物 在样品中。 格里姆斯鲁德作品的独特之处在于他使用了 光剥离调制 这提高了特异性, 分析测量的灵敏度。 人们还可以 区分基态的电子俘获能力 和激发态,这对于理解 光化学改变了卤代化合物的化学性质 在环境中。 对次级过程的研究 (电子俘获事件之前或之后的过程) 还指示大气压力气相的细节 研究化合物的化学性质,并可用于 了解分析测量中意外的灵敏度。
英文摘要
This research, in the Analytical and Surface Chemistry Program of the Chemistry Division, will study electron capture by molecules. Electron capture finds application in identification and quantification of certain classes of molecules, most prominently halogen containing molecules which are of biological and environmental importance. Prof. Grimsrud's research uses mass spectrometry to observe the process of electron capture and to quantify trace contaminants in samples. The unique aspect of Grimsrud's work is his use of photodetachment modulation. This improves specificity and sensitivity in analytical measurements. One can also differentiate electron capture capabilities of ground states and excited states, which is important in understanding how photochemistry modifies the chemistry of halogenated compounds in the environment. The study of secondary processes (processes preceeding or succeeding the electron capture event) also is indicative of details of atmospheric pressure gas-phase chemistry of the studied compounds, and is useful in understanding unexpected sensitivity in analytical measurements.
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Acquisition of Mass Spectrometry Equipment for In Situ Measurements of Trace-level Organic Compounds in the Ambient Atmosphere
  • 批准号:
    0079558
  • 项目类别:
    Standard Grant
  • 资助金额:
    $42.14万
  • 财政年份:
    2000
  • 负责人:
    Eric Grimsrud
  • 依托单位:
Detailed Investigations of Resonance Electron Capture Reactions in the Gas Phase
  • 批准号:
    9816643
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $33.6万
  • 财政年份:
    1999
  • 负责人:
    Eric Grimsrud
  • 依托单位:
Development of Ion Mobility Spectrometers for the Study of Ionic Reactions at Elevated Pressures
  • 批准号:
    9509330
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $32.89万
  • 财政年份:
    1995
  • 负责人:
    Eric Grimsrud
  • 依托单位:
Analysis of Brominated Compounds in the Atmosphere by the Photodetachment-Modulated Electron Capture Detector
  • 批准号:
    9300893
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $20.52万
  • 财政年份:
    1994
  • 负责人:
    Eric Grimsrud
  • 依托单位:
国内基金
海外基金
Muon--electron转换过程的实验研究