The emission of pure solid Ne is mostly due to atomically trappedn=1 excitons. Using theabinitiorepulsive potentials of the molecular excited states and the longhyphen;range vander Waals interactions the isotropic cavity formed around an isolated Neast; atom is calculated. The lattice relaxation is extended out to the 16th shell. The static and dynamical shifts obtained in this localized description are found to be in good agreement with experimental data.
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