Pulsed UV laser-induced modifications in optical and structural characteristics of alpha-irradiated PM-355 SSNTD
Autor: | K. Alfaramawi, Talal Mohammed Alrashidi, M. S. AlGarawi, Syed Mansoor Ali, M. R. Baig, S. S. Al-Ghamdi, W. A. Farooq |
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Rok vydání: | 2017 |
Předmět: |
010302 applied physics
Radiation Materials science Photoluminescence business.industry Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Solid-state nuclear track detector Blueshift Amorphous solid Absorbance Absorption edge 0103 physical sciences Optoelectronics Crystallite Irradiation 0210 nano-technology business |
Zdroj: | Applied Radiation and Isotopes. 128:287-291 |
ISSN: | 0969-8043 |
DOI: | 10.1016/j.apradiso.2017.07.014 |
Popis: | Pre- and postalpha-exposed PM-355 detectors were irradiated using UV laser with different number of pulses (100, 150, 200, 300, and 400). UV laser beam energy of 20mJ per pulse with a pulse width of 9ns was incident on an area of 19.6mm2 of the samples. XRD spectra indicated that for both reference and UV-irradiated samples, the structure is amorphous, but the crystallite size increases upon UV irradiation. The same results were obtained from SEM analysis. Optical properties of PM-355 polymeric solid-state nuclear track detectors were also investigated. Absorbance measurements for all PM-355 samples in the range of 200-400nm showed that the absorption edge had a blue shift up to a certain value, and then, it had an oscillating behavior. Photoluminescence spectra of PM-355 at 250nm revealed a decrease in the broadband peak intensity as a function of the number of UV pulses, while the wavelengths corresponding to the peaks had random shifts. |
Databáze: | OpenAIRE |
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