Experimental Study of Density and Thermal Expansion of the Advanced Materials and Heat Transfer Agents for Liquid Metal Systems of Thermonuclear Reactor: Lithium

Using the gamma-ray attenuation technique, the density of the condensed state of lithium is measured within the range from room temperature up to $\sim$$700$~K. The purity of the investigated lithium is as high as $99.95$~mass \%. The confidence error of experiments is within $0.3$%. From the experimental results, the volume thermal expansion coefficient of lithium is calculated within a wide temperature interval. The experimental data obtained on thermal properties of the solid and liquid state of lithium are compared to those available in the literature.