Abstract
The spectral-kinetics characteristics of short-living absorption and luminescence induced by an electron pulse irradiation (Ee=0.25 MeV, t1/2=7ns, W=2×1010÷4×1012electron/cm2) in CsI(CO3) crystal are studied. It is shown that the scintillation pulse of CsI(CO3) crystal is caused by the radiative annihilation of perturbed two-halogen excitons of two types, which are located in nearby impurity-vacancy dipole [CO32–−υa+] anion sites. The processes responsible for post-radiation rise and decay of both CO32–-related luminescence bands with maxima at 2.8 and 3.2eV are monomolecular with the thermal activation energy Erise=0.1eV and Edecay=0.05eV. The cathodoluminescence pulse kinetics is discussed in the terms of the thermally assistant release of holes captured by CO32–-ions and the formation of CO32–-perturbed two-halide excitons.
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