Hot luminescence from F centers in KCl studied by time-resolved polarization spectroscopy

A dynamical de-excitation process for optically excited electrons in F cent ers in KCl is studied by using time-resolved polarization spectroscopy. The ordinary luminescence (OL) and the hot luminescence (HL) in the OL region are separated from a resonant secondary radiation, and the HL is decomposed into two components with different behaviors. They are the HL in a short t ime after excitation and an emission from 2p-like states after a long time from excitation. The dynamics of the optical excitation is interpreted phen omenologically in terms of a configuration coordinate model. (C) 2000 Elsev ier Science B.V. All rights reserved.