Luminescence Properties of Rare Gas Solids II. Time-Resolved Luminescence Spectroscopy

In the first part of this article, examples of relaxation processes of guest molecules are discussed. Energy upconversion within the electronic ground state of CO guest molecules and interstate cascading between vibrational levels of the ground state and the first electronically excited states of CN guest molecules will be presented. The second part of this article is concerned with relaxation in the multitude of excited states of RGS. Relaxation within the excited electronic states competes with the formation of localized excimer-like centers (self-trapped excitons) and also relaxation within the excimer potential curve is observed. The electronic fine structure of the emitting states and the complex relaxation processes in pure and doped RGS are studied by static and time-resolved luminescence spectroscopy including information from photoemission measurements.