Preparation of paper scintillators and their effective use in radiation testing for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:mrow><mml:mi>α</mml:mi></mml:mrow></mml:math>- and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.svg"><mml:mrow><mml:mi>β</mml:mi></mml:mrow></mml:math>- particles in radioactive liquid, solid, and gas contaminants

Miyoshi, Hirokazu; Nakamura, Mami

doi:10.1016/j.apradiso.2024.111240

Applied Radiation and Isotopes

2024

DOI: 10.1016/j.apradiso.2024.111240

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Preparation of paper scintillators and their effective use in radiation testing for α- and β- particles in radioactive liquid, solid, and gas contaminants

Hirokazu Miyoshi,

Mami Nakamura

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Paper Scintillator Incorporated with Scintillator–Silica Fine Powders: Photophysical Characterization and Proof of Concept Demonstration of Tritium Detection

Miyoshi,

Nakamura,

Tsekrekas

et al. 2024

ACS Omega

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In order to decrease the generation of radioactive waste, it is of interest to develop a scintillator capable of absorbing tritiated solutions for efficient detection of low-energy β-particles from tritium. In this work, paper scintillator incorporated with scintillator−silica fine powders (FPs), which is composed of scintillator−silica nanoparticles (NPs) attached to silica FP, was fabricated and evaluated. The scintillator−silica NPs contained liquid scintillators benzoic acid, 2,5-diphenyloxazole (PPO), and 1,4-bis(5-phenyloxazol-2-yl) benzene (POPOP). Photophysical characterization was executed by means of photoluminescence, fluorescence lifetime, quantum efficiency, and radioluminescence under X-ray excitation. POPOP emission was confirmed by absorbing the emissions from benzoic acid and PPO. Radioluminescence results confirmed POPOP emission. Fluorescence lifetime analysis yielded a 1.29 ± 0.01 ns main fast decay (64.2%) combined with a 4.00 ± 0.04 ns slower decay (35.8%). The combined luminescence results suggested that most POPOP in the paper scintillator was solvated. At 301 nm, the average quantum efficiency from both faces of the paper scintillator was about 4%, and at 370 nm, it was about 11%. The paper scintillator detected 3 H β-particles by dipping the paper scintillator into tritiated water without a liquid scintillator. The counting efficiency depended on water content in the paper scintillator, and it increased to above 10% for tritium activity less than 200 dpm since it was preferentially adsorbed by vapor pressure isotopic effect and isotopic exchanged tritium on the surface of the scintillator−silica FP in the paper scintillator.

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Paper Scintillator Incorporated with Scintillator–Silica Fine Powders: Photophysical Characterization and Proof of Concept Demonstration of Tritium Detection

Miyoshi,

Nakamura,

Tsekrekas

et al. 2024

ACS Omega

Self Cite

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Preparation of paper scintillators and their effective use in radiation testing for α- and β- particles in radioactive liquid, solid, and gas contaminants

Cited by 1 publication

References 14 publications

Paper Scintillator Incorporated with Scintillator–Silica Fine Powders: Photophysical Characterization and Proof of Concept Demonstration of Tritium Detection

Paper Scintillator Incorporated with Scintillator–Silica Fine Powders: Photophysical Characterization and Proof of Concept Demonstration of Tritium Detection

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