Exploration of Disordered Quadrupolar Molecular Systems

无序四极分子系统的探索

• 批准号: 9812657
• 负责人: Neil Sullivan
• 金额: $ 0.99万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9812657&HistoricalAwards=false
• 关键词: Exploration; Disordered; Quadrupolar; Molecular; Systems

w:\awards\awards96\*.doc 9812657 Sullivan This small research grant expedites collaboration between an experimental nuclear magnetic resonance group in Florida and a theorist, V. B. Kokshenev, at UFMG in Brazil. The research involves theoretical models for the formation of quadrupolar and orientational glasses in molecular solids. Examples of such systems are ortho-para-hydrogen, nitrogen/argon, and methane/krypton solid mixtures. The new ideas introduced by the Brazilian collaborator have the potential of being able to distinguish between different scenarios for quadrupolar glass freezing. The approach will be tested using combined NMR and calorimetric techniques at the Univ. of Florida. This research program is interdisciplinary in nature and involves one or more graduate students, who receive excellent training in preparation for careers in industry, government laboratories or academia. %%% This small research grant expedites collaboration between an experimental nuclear magnetic resonance group in Florida and a theorist, V. B. Kokshenev, at UFMG in Brazil. The research involves advanced experimental techniques of nuclear magnetic resonance (NMR), which allows the magnetic moment of atoms to be studied within a solid sample. The experimental and theoretical research probes the interaction of different magnetic moments within a sample, and possible transitions which may occur in their collective behavior.The research involves theoretical models for the formation of quadrupolar and orientational glasses in molecular solids. Examples of such systems are ortho-para- hydrogen, nitrogen/argon, and methane/krypton solid mixtures. The new ideas introduced by the Brazilian collaborator have the potential of being able to distinguish between different scenarios for quadrupolar glass freezing. The approach will be tested experimentally using combined NMR and calorimetric techniques at the Univ. of Florida. This research program is interdisciplinary in nature and involves one or more graduate students, who receive excellent training in preparation for careers in industry, government laboratories or academia. ***

苏利文这笔小额研究经费促进了佛罗里达州一个实验性核磁共振小组与巴西UFMG的理论家V. B. Kokshenev之间的合作。该研究涉及分子固体中四极性和取向玻璃形成的理论模型。这种系统的例子是正对氢、氮/氩和甲烷/氪固体混合物。巴西合作者提出的新想法有可能区分四极玻璃冷冻的不同情况。该方法将在佛罗里达大学使用核磁共振和热量测量技术进行联合测试。该研究项目是跨学科的，涉及一名或多名研究生，他们接受了优秀的培训，为工业、政府实验室或学术界的职业生涯做准备。这笔小额研究经费促进了佛罗里达州一个实验性核磁共振小组与巴西UFMG的理论家V. B. Kokshenev之间的合作。这项研究涉及到核磁共振（NMR）的先进实验技术，它允许在固体样品中研究原子的磁矩。实验和理论研究探讨了样品内不同磁矩的相互作用，以及它们的集体行为可能发生的转变。该研究涉及分子固体中四极性和取向玻璃形成的理论模型。这类系统的例子有正对氢、氮/氩和甲烷/氪固体混合物。巴西合作者提出的新想法有可能区分四极玻璃冷冻的不同情况。该方法将在佛罗里达大学使用核磁共振和量热技术进行实验测试。该研究项目是跨学科的，涉及一名或多名研究生，他们接受了优秀的培训，为工业、政府实验室或学术界的职业生涯做准备。＊＊＊