MRI: Acquisition of Equipment to Study the Structural and Chemical Properties of Molecular Subtances Using Positron Annihilation

MRI：购置设备，利用正电子湮灭研究分子物质的结构和化学性质

• 批准号: 0115984
• 负责人: David Schoepf
• 金额: $ 7.67万
• 依托单位: Bucknell University
• 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: 2001-08-01 至 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0115984&HistoricalAwards=false
• 关键词: MRI; Acquisition; Equipment; Study; Structural

With this award from the Major Research Instrumentation program, Bucknell University will acquire equipment that is central to for the study positron annihilation in molecular solids. When positrons are injected in molecular solids they can form a positroniums, which are bound states with electrons. Along with the annihilation rate of free positrons, measurement of annihilation lifetime of positronium in molecular solids provides both chemical and structural information about the molecular solid. The instrument acquired through this award will allow measurement of both positron annihilation lifetime spectra and Doppler broadened annihilation spectra from in an effort to investigate these properties of a variety of molecular solids. Crucial timing resolution of two hundred picoseconds and energy resolution of the order of one kiloelectronvolts will be achieved. The instrumentation will be used in supervised research opportunities for undergraduates using positron annihilation to study structural and chemical properties of materials such as zeolites and will support an existing REU summer research program. With this award from the Major Research Instrumentation program, Bucknell University will acquire equipment that is central to for the study positron annihilation in molecular solids. When positrons are injected in molecular solids they can form a positroniums, which are bound states with electrons. Along with the annihilation rate of free positrons, measurement of annihilation lifetime of positronium in molecular solids provides both chemical and structural information about the molecular solid. The instrument acquired through this award will allow measurement of both positron annihilation lifetime spectra and Doppler broadened annihilation spectra from in an effort to investigate these properties of a variety of molecular solids. Crucial timing resolution of two hundred picoseconds and energy resolution of the order of one kiloelectronvolts will be achieved. The instrumentation will be used in supervised research opportunities for undergraduates using positron annihilation to study structural and chemical properties of materials such as zeolites and will support an existing REU summer research program.

巴克内尔大学将获得来自主要研究仪器项目的这一奖项，用于研究分子固体中正电子湮灭的核心设备。当正电子被注入到固体分子中时，它们会形成正电子，这是一种与电子结合的状态。随着自由正电子的湮灭速率，正电子在分子固体中的湮灭寿命的测量提供了分子固体的化学和结构信息。通过该奖项获得的仪器将允许测量正电子湮灭寿命谱和多普勒加宽湮灭谱，以努力研究各种分子固体的这些特性。关键时间分辨率为200皮秒，能量分辨率为1000电子伏特。该仪器将用于本科生的监督研究机会，使用正电子湮灭来研究沸石等材料的结构和化学性质，并将支持现有的REU夏季研究计划。巴克内尔大学将获得来自主要研究仪器项目的这一奖项，用于研究分子固体中正电子湮灭的核心设备。当正电子被注入到固体分子中时，它们会形成正电子，这是一种与电子结合的状态。随着自由正电子的湮灭速率，正电子在分子固体中的湮灭寿命的测量提供了分子固体的化学和结构信息。通过该奖项获得的仪器将允许测量正电子湮灭寿命谱和多普勒加宽湮灭谱，以努力研究各种分子固体的这些特性。关键时间分辨率为200皮秒，能量分辨率为1000电子伏特。该仪器将用于本科生的监督研究机会，使用正电子湮灭来研究沸石等材料的结构和化学性质，并将支持现有的REU夏季研究计划。