Impurity Induced Raman Spectra of Annealed and Quenched NaCl: Ca Crystals

Abstract
Raman spectra have been measured of NaCl: Ca crystals quenched or cooled slowly from high temperatures. The spectra show significant changes in structure and intensity as a function of heat treatment. The spectra of the quenched crystals are compared with the projected perturbed densities of states. Possible models are discussed in order to explain the observations.
Funding Information
  • atomic absorption analyses
  • Deutsche Forschungsgemeinschaft