Low-linear energy transfer radiolysis of liquid water at elevated temperatures up to 350C; Monte-Carlo simulations

Sanguanmith, S.*; Muroya, Yusa*; Meesungnoen, J.*; Lin, M.; Katsumura, Yosuke*; Mirsaleh Kohan, L.*; Guzonas, D. A.*; Stuart, C. R.*; Jay-Gerin, J.-P.*

Our Monte-Carlo modeling of the high-temperature radiolysis of water by low-LET radiation was re-examined in an attempt to reconcile our computed -values of the various radiolytic products with recently re-assessed experimental data up to 350C. The inclusion in our simulations of the abrupt drop in the rate constant for the self-reaction of hydrated electron above 150C led us to re-evaluate the temperature dependence of certain parameters intervening in the physicochemical stage of the radiolysis. A very good agreement was found between model and experiment. The importance of the reaction of H atoms with water in the unexplained yield of H above 200C was also briefly discussed.