Effect of water density on the absorption maximum of hydrated electrons in sub- and supercritical water up to 400 C

Jay-Gerin, J.-P.*; Lin, M.; Katsumura, Yosuke; He, H.*; Muroya, Yusa*; Meesungnoen, J.*

In this work, we measure the density dependent absorption spectra of hydrated electron in DO at 380, 390, and 400C, and then compare with the literature data for subcritical water. The results show that at a fixed pressure (25 MPa), decreases monotonically with increasing temperature in passing through the liquid-supercritical water (SCW) phase transition at t. By contrast, at a fixed density (0.2 and 0.65g/cm), exhibits a minimum near . These behaviors are explained in terms of local density and configurational fluctuations of water structure in SCW.