Abstract
In search of potential laser-active colour centres, we have created and spectroscopically studied for the first time (F2+)AH centres in KCl:Li+:O2- and RbCl:Na+:O2-. We compare them with the 'classical' (F2+)AH centres in KCl:Na+:O2- and KBr:Na+:O2-. We describe preparation procedures, and absorption and emission spectra at 100 and 5 K. We study the stability of the centres in the dark at room temperature, an important property for laser applications. Preliminary data concerning (F2+)AH centres in KBr:Na+:S2- are also reported.
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