Abstract
The influence of Mg impurity in an LiF crystal on the lifetime of the relaxed excited state of the F 2 and F + 3 centers is investigated for the first time by using the time-correlated photon counting technique at room temperature (RT). It is found that the radiative lifetime of the excited F 2 centers is almost independent of the Mg impurity concentration, while that of the excited F + 3 centers varies strongly with the corresponding impurity concentration.
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