Abstract
Exploratory work on gamma exposure to dried solids with chemically-bound water that are typical of those produced on aluminum-clad nuclear fuel in reactor and post-discharge storage has shown a profound production of hydrogen (as the sole gaseous species) from dry boehmite (γ-AlOOH or Al2O3·H2O) powders and barely observable hydrogen from dry gibbsite (γ-Al(OH)3 or Al2O3·3H2O) under gamma irradiation from cobalt-60. A computational investigation of hydrogen bond energies was performed to provide insights to explain the experimental observations. A gas phase or single-molecule model, and a solid phase model were used. For all model reactions, computations indicate hydrogen loss is more favorable for boehmite than for gibbsite, in qualitative agreement with the experimental findings.
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