Radioluminescence from electron-irradiated poly(methyl methacrylate), PMMA, pure and doped with pyrene (Py) was investigated in the temperature range of 77-295 K. The spectra of emission were recorded, and temperature dependences of radioluminescence intensities at chosen wavelengths were examined using a novel wavelength-selected radiothermoluminescence (WS RTL) technique. The correlation between the WS RTL peaks and matrix relaxation temperatures were found. The experimental results were explained in terms of solute radical ion recombination leading to the Py monomer and excimer fluorescence. The luminescence results were correlated with the decay of Py ions as observed by spectrophotometric absorption method.
Research on Chemical Intermediates – Springer Journals
Published: Oct 7, 2004
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