Abstract
The ground-state properties of the He IV-A crystal are studied. The analytic form of a two-body force between pairs of He* atoms is derived from existing data. This function is then used to compute the classical cohesive energy of the crystal for several types of cubic lattices. Quantum mechanical ground-state energy calculations involving cluster expansion techniques and the method of correlated wavefunctions are also presented. On the basis on these calculations the FCC lattice structure of He IV-A appears to be energetically preferred.
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