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LIZBETH ALEX1, RAJESH PAULRAJ1,* , MOHIT TYAGI2
- Centre for Crystal Growth, Department of Physics, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, Tamilnadu, India
- 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)
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