A prioricalculation of then=1valence exciton of solid neon

The energies of the $n=1\mathrm{}$ excitons in solid neon have been calculated on the basis of the ab initio repulsive-potential curves of the molecular excited states derived from ${}_{}{}^3{}_{}{}^{}P$ and ${}_{}{}^1{}_{}{}^{}P$ states of neon and the long-range Van der Waals interaction of these states. With this rigorous parameter-free calculation a very good agreement with experimental results is obtained for the first exciton doublet.