Abstract:

In time resolved luminescence spectra, taken within the temperature range of 1180 K, the two lowest excited states of rare gas crystals are observed. One of them, the long lived 3 state is identified as the initial state for transient absorption. The transient absorption spectra (1180 K) indicate strong similarities between self-trapped excitons in the crystals and free excimers, but only in the energy region up to 1.5 eV above the lowest excited state 3. Higher energy levels and the continuum states of the self-trapped exciton are strongly influenced by solid state effects. The Journal of Chemical Physics is copyrighted by The American Institute of Physics