Pulsed Magnetic Resonance at Low Temperatures

低温脉冲磁共振

• 批准号: 8701515
• 负责人: Richard Norberg
• 金额: $ 28.63万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-05-15 至 1990-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8701515&HistoricalAwards=false
• 关键词: Pulsed; Magnetic; Resonance; Low; Temperatures

Professor Norberg will continue a program of pulsed nuclear magnetic resonance at low temperatures. The research includes: NMR studies of molecular hydrogen and (NMR) deuterium trapped in microvoids in amorphous semiconductors and in large crystal fields in solid argon and new NMR studies at low temperatures of hydrogen layers on uniform surfaces and in restricted geometries provided by well-defined porous matrices; new NMR experiments on physisorbed layers of krypton and xenon on well-characterized surfaces. Studies on rare gas solids at high pressures to determine the isochoric behavior of diffusion and relaxation by impurities will be made. NMR at very high pressures in a diamond anvil cell will be used to examine phase transformations, structure, and dynamics in condensed hydrogen, deuterium and in rare gas mixtures and in ammonia.

诺伯格教授将继续一个脉冲核武器项目 低温下的磁共振 研究内容包括： 分子氢和氘的NMR研究 非晶半导体和大晶体中的微孔 场和新的核磁共振研究在低温下的固体氩 均匀表面和受限几何形状的氢层 由定义明确的多孔基质提供;新的核磁共振实验 氪和氙的物理吸附层， 表面。 高压下稀有气体固体的研究 确定扩散和松弛的等容行为， 将产生杂质。 金刚石中高压下的核磁共振 砧室将用于检查相变， 结构和动力学在凝聚氢，氘和 稀有气体混合物和氨中。