(1978) Briginec, V. P.; Jurackovskij, P. A.; Pertschi, Ottmar (Übersetzer)
Optical absorption of additively coloured KCl-Sr-crystals was studied. A conclusion is made that optical absorption of two sets of bands deriving from Z2- and Z5-centres, respectively.
A two-electron structure of Z5-centres is established.
