Abstract
The luminescence of (F2+)H centres in additively doped KCl:CO32- crystals excited using light in the F-band is reported. The emission spectrum consists of two bands peaking at 610 and 750 nm which are strongly dependent on prior photo- and thermal-treatments. The two bands are associated with different configurations of the (F2+)H centres. The temperature dependences of the luminescence spectra indicate the existence of several stable configurations of the (F2+)H centres which are distinguished through the zero phonon lines observed in the absorption spectrum measured at low temperature.
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