X-ray excited luminescence of polystyrene composites loaded with SrF 2 nanoparticles
| Autor: | O.O. Halyatkin, A. Gektin, V.B. Hevyk, A. S. Voloshinovskii, P. M. Yakibchuk, V.V. Vistovskyy, T. Demkiv |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
chemistry.chemical_classification Physics Nuclear and High Energy Physics Nanocomposite Nanoparticle Phosphor 02 engineering and technology Polymer Scintillator 021001 nanoscience & nanotechnology 01 natural sciences Nanomaterials chemistry.chemical_compound chemistry 0103 physical sciences Polystyrene Composite material 0210 nano-technology Luminescence Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 847:47-51 |
| ISSN: | 0168-9002 |
| DOI: | 10.1016/j.nima.2016.11.028 |
| Popis: | The polystyrene film nanocomposites of 0.3 mm thickness with embedded SrF 2 nanoparticles up to 40 wt% have been synthesized. The luminescent and kinetic properties of the polystyrene composites with embedded SrF 2 nanoparticles upon the pulse X-ray excitation have been investigated. The luminescence intensity of the pure polystyrene scintillator film significantly increases when it is loaded with the inorganic SrF 2 nanoparticles. The film nanocomposites show fast (∼2.8 ns) and slow (∼700 ns) luminescence decay components typical for a luminescence of polystyrene activators (p-Terphenyl and POPOP) and SrF 2 nanoparticles, respectively. It is revealed that the fast decay luminescence component of the polystyrene composites is caused by the excitation of polystyrene by the photoelectrons escaped from the nanoparticles due to photoeffect, and the slow component is caused by reabsorption of the self-trapped exciton luminescence of SrF 2 nanoparticles by polystyrene. |
| Databáze: | OpenAIRE |
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