De-Excitation Pathways of Highly-Excited Self-Trapped Exciton and Electron Plus Self-Trapped Hole

The yield of F - H pairs in KBr upon photo-excitation of the electron of the self-trapped excitons to n ≥3 orbitals is found to be much lower than that upon photoexcitation to the n =2 orbitals and than the overall yield of the F centers under ionizing radiation. The results imply that the de-excitation pathways of excited self-trapped excitons and the electron trapped by the self-trapped holes are different.