Nukleonika (Dec 2015)

PALS investigations of free volumes thermal expansion of J-PET plastic scintillator synthesized in polystyrene matrix

  • Wieczorek Anna,
  • Zgardzińska Bożena,
  • Jasińska Bożena,
  • Gorgol Marek,
  • Bednarski Tomasz,
  • Białas Piotr,
  • Czerwiński Eryk,
  • Gajos Aleksander,
  • Kamińska Daria,
  • Kapłon Łukasz,
  • Kochanowski Andrzej,
  • Korcyl Grzegorz,
  • Kowalski Paweł,
  • Kozik Tomasz,
  • Krzemień Wojciech,
  • Kubicz Ewelina,
  • Niedźwiecki Szymon,
  • Pałka Marek,
  • Raczyński Lech,
  • Rudy Zbigniew,
  • Rundel Oleksandr,
  • Sharma Neha Gupta,
  • Silarski Michał,
  • Słomski Artur,
  • Strzelecki Adam,
  • Wiślicki Wojciech,
  • Zieliński Marcin,
  • Moskal Paweł

DOI
https://doi.org/10.1515/nuka-2015-0140
Journal volume & issue
Vol. 60, no. 4
pp. 777 – 781

Abstract

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The polystyrene doped with 2,5-diphenyloxazole as a primary fluor and 2-(4-styrylphenyl)benzoxazole as a wavelength shifter prepared as a plastic scintillator was investigated using positronium probe in wide range of temperatures from 123 to 423 K. Three structural transitions at 260, 283, and 370 K were found in the material. In the o-Ps intensity dependence on temperature, the significant hysteresis is observed. Heated to 370 K, the material exhibits the o-Ps intensity variations in time.

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