CAREER: Pushing low-field magnetic resonance to the limit

事业：将低场磁共振推向极限

• 批准号: 0547987
• 负责人: Karen Sauer
• 金额: $ 50.54万
• 依托单位: George Mason University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-07-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0547987&HistoricalAwards=false
• 关键词: CAREER; Pushing; low; field; magnetic

This CAREER focuses on advancing theory and practice in the design, modeling, and control of low-field magnetic resonance experiments. The research will lead to practical methods for increasing the sensitivity of low-field magnetic resonance experiments and a deeper understanding of the information that can be gained about samples in low fields. The theory and applications of low-field magnetic resonance will be investigated through nuclear quadrupole resonance (NQR). The key innovative claims of the research are 1) the project will demonstrate that the effective strength of the dipolar coupling between a spin-1 nucleus and a spin-1/2 nucleus, which is normally quenched at zero magnetic field, can be increased significantly under various types of resonance conditions and 2) multi-pulse sequences, which continually refocus the signal from a sample, serve not only to increase the detection sensitivity in NQR, but also to probe the internal magnetic and electric fields. The educational objectives are to integrate experimental research methodologies and demonstrations into the physics teaching curriculum and to increase the participation of women in the sciences. This latter will be fostered through a mentorship program for female high school students in the summer and through the establishment of a networking group for women in the sciences to expose female undergraduates to the experiences of women engaged in science-related careers.

本专业致力于推进低场磁共振实验的设计、建模和控制方面的理论和实践。该研究将为提高低场磁共振实验的灵敏度提供实用的方法，并加深对低场样品信息的理解。通过核四极共振（NQR）研究低场磁共振的理论和应用。该研究的关键创新主张是：1)该项目将证明，在不同类型的共振条件下，通常在零磁场下淬灭的自旋为1的原子核和自旋为1/2的原子核之间的偶极耦合的有效强度可以显著增加；2)多脉冲序列，不断地重新聚焦来自样本的信号，不仅可以提高NQR的检测灵敏度，还可以探测内部的磁场和电场。教育目标是将实验研究方法和示范纳入物理教学课程，并增加妇女对科学的参与。后者将通过在夏季为女高中生提供指导计划和建立一个科学领域的妇女网络小组来培养，使女大学生了解从事科学相关职业的妇女的经验。