International Postdoctoral Fellows Program: Earth's Field Nuclear Magnetic Resonance Study of Antarctic Sea Ice

9500445西摩国际初级研究员和博士后研究员计划使美国科学家和工程师能够在国外优秀的研究中心进行为期3至12个月的研究。该项目的奖项提供了联合研究的机会，并提供了使用国外独特或互补的设施、专业知识和实验条件的机会。这一奖项将支持约瑟夫·D·西摩博士与保罗·T·卡拉汉博士在梅西大学进行为期12个月的博士后研究访问。研究人员建议使用核磁共振(核磁共振)实验技术来非侵入性地探测海冰的结构。实验室制造的海冰将使用核磁共振成像和海冰卤水中质子的扩散测量进行分析。各向异性和受限扩散的图像和测量将提供有关实验室海冰形态的数据。南极工作将使用核磁共振系统测量海冰岩芯样品的磁化松弛参数。使用地球现场核磁共振系统是该项目的一个重要方面，因为该技术可能应用于从现场传感器到地下环境危险检测。这项研究是新西兰海冰项目的一部分，该项目涉及四所大学和一家皇冠研究所，在该项目中，对海冰进行物理和机械测量，以促进对海冰物理特性的了解。***

9500445 Seymour The International Junior Investigator and Postdoctoral Fellows Program enables U.S. scientists and engineers to conduct three to twelve months of research abroad at research centers of proven excellence. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad. This award will support a twelve-month postdoctoral research visit by Dr. Joseph D. Seymour to work with Dr. Paul T. Callaghan at Massey University. The investigator proposes to use nuclear magnetic resonance (NMR) experimental techniques to noninvasively probe the structure of sea ice. Laboratory manufactured sea ice will be analyzed using NMR imaging and diffusion measurements of protons in the entrapped brine of the sea ice. Images and measurements of anisotropic and restricted diffusion will provide data on laboratory sea ice morphology. The Antarctic work will be conducted using an NMR system to measure magnetization relaxation parameters of sea ice core samples. Use of the earth's field NMR system is an important dimension of this project because of possible applications of the technique, ranging from on site sensors to underground environmental hazard detection. The study is part of the New Zealand Sea Ice Project, a collaboration involving four universities and a Crown Research Institute, in which physical and mechanical measurements on sea ice are made to advance understanding of sea ice physical properties. ***