An experimental investigation of the density and thermal expansion of advanced materials and heat-transfer agents of liquid-metal systems of fusion reactor: Lead-lithium eutectic

The method of penetrating gamma-rays is used to measure the density of eutectic alloy of the $\mathrm{Pb}$–$\mathrm{Li}$ system in the condensed state in the temperature range from $360$ to $880$ K. The confidence error of the experimental results is $0.4\%$ and $0.3\%$ for the solid and liquid phases, respectively. The experimental results for the density of lead-lithium eutectic are used to calculate the thermal expansion in the investigated temperature range. The investigation results are compared with the available literature data on the thermal properties of $\mathrm{Pb}$–$\mathrm{Li}$ eutectic in the solid and liquid phases.