[MIS11-P03] Electron irradiations onto ice-salt mixtures at low temperatures: Implications for chemical evolution and oxidant formation on Europa
Keywords:Irradiation experiment, Europa, chemical evolution
Here we construct a novel experimental system for irradiation of electron onto ice and salt (e.g., chloride: NaCl and MgCl2) mixtures at low temperatures. Laboratory experiments on electron irradiation onto NaCl salt have been conducted at low temperatures corresponding to Europa’s surface (e.g., Hand and Carlson, 2015). However, no experiments have been performed to simulate the irradiation of electron onto ice and salt mixtures on Europa. Upon electron irradiation onto ice and chloride mixtures, chloride may be oxidized into perchlorate salts. If the surface materials are provided into the subsurface ocean through crustal recycling (e.g., Hand et al., 2007), perchlorate would become an important oxidant to generated redox disequilibria in the ocean. We report preliminary results on the electron irradiation experiments using the newly-constructed system.