Evaluation of an ultra-thin plastic scintillator to detect alpha and beta particle contamination

Morishita, Yuki; Hoshi, Katsuya; Torii, Tatsuo

doi:10.1016/j.nima.2020.163795

Cited by 9 publications

(2 citation statements)

References 18 publications

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“…Consequently, only the fraction of tritium emissions directed toward the scintillator can potentially be detected, with the remaining emissions being lost in air. Also, evaluation of an ultrathin or thin-film PS having a thickness of 5–100 μm to detect α- and β-particles has been reported by Morishita et al and Koshimidzu et al In fact, since β-particles from tritium have a low energy of 18.6 keV and their range is only 6 mm in air and 6 μm in water; only a small fraction of all tritium emissions is actually detected by the PS. Therefore, it will be helpful to find a way to have all β-particles being emitted from inside the scintillator toward achieving efficient tritium detection.…”

Section: Introductionmentioning

confidence: 96%

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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Section: Introductionmentioning

confidence: 96%

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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“…Inorganic scintillators are widely used as radiation detector materials in high-energy physics, nuclear radiation detection, medical and industrial imaging, and other applications [1][2][3][4]. The detector performance is considerably governed by the scintillator's luminescence properties, such as emission spectrum, decay time and light yield [5].…”

Section: Introductionmentioning

confidence: 99%

A first-principles investigation of excitation and emission processes of CsI(Tl) under near-UV radiation

Gao,

Qin,

Wang

et al. 2024

Phys. Scr.

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Based on the analyses of excitation paths in CsI(Tl) under near-UV light (λmin=220 nm), all possible excited states are modeled. The emission paths are revealed by thefirst-principles calculations performed for each excited state. Based on the analyses of band structure, density of states (DOS), and transition dipole moment (TDM), the theoretical range of central emission wavelength is proposed as 517 ∼ 538 nm for the Tl-center luminescence and 375 ∼ 405 nm for the intrinsic luminescence. This prediction agrees well with the experimental emission spectra, which have a peak at 514.2 nm and a shoulder at 410.6 nm. This method can be applied to CsI(Tl) under higher-energy radiation and other halide scintillator materials.

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Introduction—Overview on Plastic and Inorganic Scintillators

Dujardin

2021

Topics in Applied Physics

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Evaluation of an ultra-thin plastic scintillator to detect alpha and beta particle contamination

Cited by 9 publications

References 18 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

A first-principles investigation of excitation and emission processes of CsI(Tl) under near-UV radiation

Introduction—Overview on Plastic and Inorganic Scintillators

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