Excitonically-Induced Mechanisms of Inelastic Processes in Rare-Gas   Solids
  The models of permanent lattice defect formation in rare-gas solids are discussed with a focus on a point defect formation in solid Ar. The processes of large-scale atomic displacements induced by electronic excitations were studied using the selective vacuum ultraviolet spectroscopy method. The coexistence of intrinsic excitonic mechanism and extrinsic Rydberg state induced excited-state mechanism of Frenkel defect formation was found. 
A.N. Ogurtsov, G. Zimmerer