The optical properties of liquid plutonium at 632.8 nm

The optical properties and normal, spectral emissivity of liquid plutonium at 632.8 nm were measured over a temperature range of 2016–2189 K using rotating analyzer ellipsometry. The purity of the liquid was maintained in a containerless environment using electromagnetic levitation and heating. The material investigated contained 1 wt% Ga that was added during the casting process. The measured values of the optical property results are given as a function of temperature by ϵ λ =5.38×10 −5 T+0.250, n λ =−1.29×10 −4 T+3.82, and k λ =−7.04×10 −4 T+5.77 over the investigated temperature range.