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Effect of PPO and POPOP activators on the scintillation performance of polystyrene-based scintillator



  1. Centre for Crystal Growth, Department of Physics, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, Tamilnadu, India
  2. Crystal Technology Section, Technical Physics Division, Bhabha Atomic Research Centre, 400085, Mumbai, India


In this paper, a polystyrene-based plastic scintillator of 4.5 cm diameter and 2.5 cm length doped with 2,5-diphenyloxazole (PPO) and 1,4-bis[2-(phenyloxazolyl)]-benzene (POPOP) was synthesized using thermal polymerization reaction carried out at 120°C. Optical transmittance was measured by Perkin Elmer UV-Vis NIR spectrophotometer in the wavelength region of 200-900 nm. The maximum peak of the emission spectra was obtained at 420 nm using Fluorescence spectrophotometer. The radioluminescence measurement of the synthesized sample exhibited a very strong emission band in the wavelength range from 400 to 600 nm, with a peak maximum at 420 nm for different voltages. The fabricated scintillator possessed a linear variation of intensity with respect to the voltage. The fast scintillation decay time of the fabricated plastic scintillator was investigated using γ-rays from 137Cs radiation source. Pulse height spectra were recorded using different gamma ray sources such as 137Cs, 60Co and 22Na. The results showed that the above-mentioned material is a promising and a potential candidate for scintillation and neutron detection applications..


Polystyrene, Plastic Scintillator, Thermal polymerization, Radioluminescence, Decay time, Pulse height spectra.

Submitted at: Sept. 17, 2021
Accepted at: Aug. 10, 2022


LIZBETH ALEX, RAJESH PAULRAJ, MOHIT TYAGI, Effect of PPO and POPOP activators on the scintillation performance of polystyrene-based scintillator, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 7-8, pp. 365-371 (2022)