Finding
It is shown that fast electrons create stable F and F + color centers with characteristic emission and absorption bands in the visible/UV range.
Paper
Investigation of luminescence processes in YAG single crystals irradiated by 50 MeV electron beam
Abstract
Abstract Absorption, emission and excitation spectra of 50 MeV electron beam irradiated and as-grown YAG single crystals were studied and compared in the 10–300 K temperature range using time-resolved luminescence spectroscopy under UV/VUV/XUV excitation by synchrotron radiation and cathodoluminescence. The emission spectra consist of intrinsic (excitonic) and defect related non-elementary bands in the VIS/UV range. It is shown that fast electrons create stable F and F + color centers with characteristic emission and absorption bands in the visible/UV range. Induced absorption caused from these defects starts at 4.2 eV. Energy transfer from host to color centers is not an efficient process.
Authors
E. Aleksanyan, M. Kirm, S. Vielhauer
Journal
Radiation Measurements