Energetics of hydrogen in aluminum

A detailed account of the results obtained for the energetics of a proton in aluminum is reported. The central model used in the calculations is the so-called ''spherical solid model'' in which the part of the ionic potential which is spherically symmetric around the impurity is treated to all orders. Various additional effects, such as the contributions of the nonspherical potential and lattice relaxation are investigated. The variation of the heat of solution of H in Al with position is calculated, and the zero-point vibration energy estimated