Polarized luminescence of (Ga'),, (In+), and (Tl+), centres in KC1 crystals is investigated experimentally. I n the series of KCl, KBr, and K I crystals the (Tl+), centres are studied in order to clear up the influence of the anions on the (A'), centre properties. The quasimolecules [TI,X,,Js-and [T1,Xll]8-, where X are c1or Iions, with the symmetry D2h and Dab, respectively, were theoretically considered by a MO method. An attempt is made to prove the model of the (A+), centres basing on a comparison of the results of the experimental and theoretical investigations.
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