Pauli-principle effects in the analysis of optical spectra

Dipolar-absorption sum rules may be applied to isolated defect spectra prov ided corrections are made for occupied states of the host crystal. These ap pear as Pauli-principle terms for forbidden "transitions" to occupied orbit als. Evaluation of atomic systems shows the corrections are 5 to 20% for th e electron-concentration and rms-radius rules, but may amount to a factor o f two or more for the kinetic-energy rule.