RUI: Ultrasonic Studies in the Alkali Metals

RUI：碱金属的超声波研究

• 批准号: 8819608
• 负责人: Joseph Trivisonno
• 金额: $ 12.32万
• 依托单位: John Carroll 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 1992-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8819608&HistoricalAwards=false
• 关键词: RUI; Ultrasonic; Studies; Alkali; Metals

Their program will consist of four topics. (1) Direct electromagnetic generation of ultrasound in alkali metals. This includes looking for lattice instabilities, charge-density wave (CDW) structure, and measurements in high magnetic fields. (2) Single crystal growth and neutron diffraction studies in alkali metals, in collaboration with people at Oak Ridge National Laboratory, University of Missouri, and National Institute of Standards and Technology. They will look at sodium, lithium, and lithium magnesium alloys. (3) Ultrasonic attenuation and velocity in high temperature superconductors using primarily their own samples. They will look at a variety of samples and include pressure effects. (4) Ultrasonic studies near the melting point in alkali metals (sodium, potassium, cesium). They hope to reach within 0.1 mK of melting point.

他们的课程将包括四个主题。(1)碱金属中超声波的直接电磁产生。这包括寻找晶格不稳定性，电荷密度波（CDW）结构，以及在高磁场中的测量。(2)碱金属的单晶生长和中子衍射研究，与橡树岭国家实验室、密苏里大学和国家标准与技术研究所的人合作。他们将研究钠、锂和锂镁合金。(3)超声波在高温超导体中的衰减和速度，主要使用自己的样品。他们将研究各种各样的样本，包括压力效应。(4)碱金属（钠、钾、铯）熔点附近的超声波研究。他们希望达到0.1 mK的熔点。