Abstract
The fluorescence of Ag + in NaCl was investigated in the range of 21–300 K, in particular by performing accurate lifetime measurements. Lifetime values in the range of 21–100 K are consistent with the Pedrini model for Cu + and Ag + de-excitation. In contrast, lifetime values above 100 K are not consistent with the relationship involved in such a model simply because above 100 K the relative fluorescence quantum yield is not unity; this explains the puzzling results obtained in the past by Pedrini in NaCl:Ag +. Lifetime data were found irrespective of Ag + concentration in the samples.
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