NASA Technical Note


Book Description




Contamination Effects on Liquid Rubidium and Liquid Lithium Systems


Book Description

A research program directed toward the goal of developing an improved understanding of contamination effects on liquid rubidium and liquid lithium systems is described. Experimental measurements were conducted on the vapor pressure of pure rubidium, the melting point of pure and oxygen-contaminated rubidium, and the melting point of pure and nitrogen-contaminated lithium. A capillary viscometer was designed and constructed and extensive viscosity data were measured for pure and oxygen-contaminated rubidium from less than 200 F to about 1200 F. Pumping experiments in an isothermal loop re vealed that oxygen contamination is quite deleterious to the electromagnetic pumping characteristics of rubidium.
















Electrical Resistivity of Alkali Elements


Book Description

This technical report presents and discusses the available data and information on the electrical resistivity of alkali elements (lithium, sodium, potassium, rubidium, cesium, and francium) and contains recommended reference values (or provisional or typical values). The compiled data include all the experimental data available from the literature and cover the temperature dependence, pressure dependence, and magnetic flux density dependence. The temperature range covered by the compiled data is from cryogenic temperatures to above the critical temperature of the elements. The recommended values are generated from critical evaluation, analysis, and synthesis of the available data and information and are given for both the total electrical resistivity and the intrinsic electrical resistivity. For most of the elements, the recommended values cover the temperature range from 1 K to 2000 K.