Abstract
Measurements of fast luminescence decays and time-resolved spectra reveal novel ultra-short-lived luminescence (several tens ps) in N-, Ar-, Kr- and Xe-ion irradiated single crystals of 12 kinds of alkali halides, two alkaline-earth halides, three oxides and one semiconductor, but no such luminescence by He-ion irradiation. The luminescence spectrum covers a region, from UV to VIS (in some oxides, from VUV). The luminescence efficiency is characterized by its super-linear increase to excitation density, non-tailing decay, sample dependence and temperature-insensitiveness. The luminescence can neither be attributed to known excited species nor to their interaction, but to vigorous interaction among dense electron–hole pairs, i.e. plasma.
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Schedule a callMore From: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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