IMPURITY CENTRES.Ni+ and Ni3+ centers in X-irradiated CaF2

J. Casas, H. W. Den Hartog, R. Alcalá
1980 Le Journal de Physique Colloques  
doi:10.1051/jphyscol:1980649 fatcat:4fv2kgwci5clfpazzxopiycmmq