Abstract
Functional plastic scintillators have attracted much attention for their usefulness in on-site monitoring and detection in environments. In this study, we elucidated a highly reliable and functional plastic scintillator for detection of radioactive strontium, which means a potent perovskite-loaded polymeric scintillation material based on epoxy and 2,5-diphenyloxazole (PPO). Moreover, Monte Carlo N-Particle (MCNP) simulation was performed to optimize the thickness of a plastic scintillator for efficient strontium detection. A thickness of 2 mm was found to be the optimum thickness for strontium beta-ray detection. A newly developed plastic scintillator with 430 nm emission from perovskite loading could trigger scintillation enhancement employing potential indication of perovskite energy transfer into a photomultiplier (PMT) detector. Furthermore, the response to beta-ray emitter of 90Sr was compared to commercial scintillator of BC-400 by exhibiting detection efficiency in the energy spectrum with a fabricated perovskite-loaded plastic scintillator. We believe that this suggested functional plastic scintillator could be employed as a radiation detector for strontium detection in a wide range of applications including decommissioning sites in nuclear facilities, nuclear security and monitoring, nonproliferation, and safeguards.
Highlights
Published: 8 March 2021In general, radioactive strontium as a fission product is one of the common radioisotopes found at the decommissioning sites in nuclear facilities
10 g epoxy and 10 g hardener monomer were mixed in a bottle with PPO (0.2 wt%), POPOP (0.01 wt%), and perovskite (0.5 wt%) for characteristic evaluation and detection efficiency comparison to demonstrate the scintillation enhancement through the Förster Resonance Energy Transfer (FRET) mechanism occurring inside the scintillator
Plastic scintillator materials have been employed as radiation detectors in many areas including nuclear security, nonproliferation, safeguards, and basic science and technology
Summary
Published: 8 March 2021In general, radioactive strontium as a fission product is one of the common radioisotopes found at the decommissioning sites in nuclear facilities. 90 Sr is the most abundant radioisotope that remains in the 20~30 years later of the nuclear power plant’s decommissioning sites [1]. Radiation measurements such as dosimetry and dose controls are carried out by Geiger–Muller (GM) counter, gas proportional counter, or liquid scintillation counter (LSC) by measuring the high energy beta-ray emitted by 90 Y [1,2,3]. 90 Y from radioactive strontium is accumulated in the pancreas, which can lead to a number of problems in the body, such as cancer [6]
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