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Effect of water density on the absorption maximum of hydrated electrons in sub- and supercritical water up to 400 $$^{circ}$$C

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

In this work, we measure the density dependent absorption spectra of hydrated electron in D$$_{2}$$O at 380, 390, and 400 $$^{circ}$$C, and then compare with the literature data for subcritical water. The results show that at a fixed pressure (25 MPa), ${it E$_{A}$}$-$$_{max}$$ decreases monotonically with increasing temperature in passing through the liquid-supercritical water (SCW) phase transition at ${it t$_{c}$}$. By contrast, at a fixed density (0.2 and 0.65 g/cm$$^{3}$$), ${it E$_{A}$}$-$$_{max}$$ exhibits a minimum near ${it t$_{c}$}$. These behaviours are explained in terms of local density and configurational fluctuations of water structure in SCW.

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Japanese

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第51回放射線化学討論会

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2008/10

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つくば

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日本

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no keyword

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Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Universit$'e$ de Sherbrooke; 東京大学

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