Properties of Fluid Helium and of Quantum Solids

液态氦和量子固体的性质

• 批准号: 8820479
• 负责人: Horst Meyer
• 金额: $ 34.68万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-03-01 至 1994-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8820479&HistoricalAwards=false
• 关键词: Properties; Fluid; Helium; Quantum; Solids

The first area of research deals with the transport properties in liquid helium near the superfluid transition. It is proposed 1) to investigate the non-linear temperature profile when the normal and the superfluid phases coexist under a heat current, and the dynamics of the interface. 2) to continue systematic study of transport properties in very dilute solution of 3He in 4He. The second area is concerned with dynamic phenomena in solid H2 and D2. They propose 1) to study the clustering of ortho-H2 in H2 through quantum diffusion simultaneously via NMR and thermal conductivity experiments. 2) to extend in a new high-pressure cell the NMR measurements of ortho-H2 clustering to 1 kilobar.

研究的第一个领域涉及超流体过渡附近液氦的运输特性。 提议1）研究非线性温度曲线时，当正常和超氟相位在热电流下共存以及界面的动力学时。 2）在4HE中的3He非常稀释的溶液中继续系统地研究运输特性。 第二个区域与固体H2和D2中的动态现象有关。 他们建议1）通过NMR和热导率实验同时通过量子扩散研究H2中正h2的聚类。 2）在新的高压电池中延伸，将Ortho-H2聚类的NMR测量值延伸至1千巴。