S>Knowledge of the deposition of energy with distance around an underground nuclear explosion has significance in predicting chemical processes in the multimineralic rock substance surrounding the explosion. When a nuclear explosion is detonated, the shock wave that emanates from the explosion center does PdV work on the rock substance and deposits energy. Energy deposition due to the passage of the shock wave is determined from hydrodynamic code calculations which keep track of internal energy with distance and time. The energy distribution with distance depends on the compressibility of the rock. Rock of low density and high porosity requires a larger increase in internal energy to shock it to a given pressure than an essentially pore-free dense rock. Interpretation of hydrodynamic code calculations shows that 1000 to 1200 metric tons/kt of melt is produced from dense granite and that two to three times as much melt is produced from dry porous ash-fall tuff. Radiochemical analysis of melt samples recovered from near the shot point tend to confirm these results. (auth)

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An ion microprobe mass analyzer was used to investigate the reaction pathway for the formation of lithium hydroxide and lithium oxide on freshly cleaved lithium deuteride surfaces. Mass spectra were obtained from the lithium deuteride surfaces before and after exposure to room air, and the composition of the corrosion film was determined by depth-profiling methods. The corrosion film appears to be layered in the following manner: lithium hydroxide on lithium oxide on lithium deuteride. (auth)