Preparation and performance study of a novel liquid scintillator with mixed solvent as the matrix

Zheng, Zhanlong; Zhu, Jianping; Xu, Yewei; Zhang, Qian‐Feng; Zhang, Xing; Bi, Yutie; Zhang, Lin

doi:10.1016/j.nima.2017.01.033

Cited by 8 publications

(3 citation statements)

References 28 publications

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“…Mixed solvent such as linear alkyl benzene and pseudocumene have already been described, here to benefit from advantages of each solvent to some extent. 27 Although not related to the scintillation field, Wolff et al have noticed that adding viscous solvent (which is in this case diisopropylnaphthalene -DIN) to a fluid solution containing 9,10-dimethylanthracene leads to increasing its apparent decay time from 12 up to 30 ns. 28 Other applications have already studied the viscosity dependence on the fluorescence lifetime, such as in the field of molecular rotors, 29,30 and protein fluorescence kinetics.…”

Section: Photophysical Propertiesmentioning

confidence: 99%

Tuning the decay time of liquid scintillators

Sabot

Dutsov

Bertrand

et al. 2021

Journal of Luminescence

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Section: Photophysical Propertiesmentioning

confidence: 99%

Tuning the decay time of liquid scintillators

Sabot

Dutsov

Bertrand

et al. 2021

Journal of Luminescence

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“…Because the quantum yield depends on the nature of the incident particles and photons with varying degrees of energy, a proper scintillation material is chosen according to the type of application. Compared with crystalline or plastic scintillators, liquid scintillators generally have better resistance to damage arising from exposure to intense radiation while providing excellent area/volume scalability 7,8 ; consequently, liquid scintillators are used for various purposes, such as in β-ray spectroscopy, radioactivity measurements, and particle physics 9,10 . However, despite the above advantages, liquid scintillators have relatively low density and low radioluminescence (RL) quantum yield, both of which are crucial in achieving high resolution and contrast in X-ray imaging.…”

Section: Introductionmentioning

confidence: 99%

Hybridisation of perovskite nanocrystals with organic molecules for highly efficient liquid scintillators

et al. 2020

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Compared with solid scintillators, liquid scintillators have limited capability in dosimetry and radiography due to their relatively low light yields. Here, we report a new generation of highly efficient and low-cost liquid scintillators constructed by surface hybridisation of colloidal metal halide perovskite CsPbA3 (A: Cl, Br, I) nanocrystals (NCs) with organic molecules (2,5-diphenyloxazole). The hybrid liquid scintillators, compared to state-of-the-art CsI and Gd2O2S, demonstrate markedly highly competitive radioluminescence quantum yields under X-ray irradiation typically employed in diagnosis and treatment. Experimental and theoretical analyses suggest that the enhanced quantum yield is associated with X-ray photon-induced charge transfer from the organic molecules to the NCs. High-resolution X-ray imaging is demonstrated using a hybrid CsPbBr3 NC-based liquid scintillator. The novel X-ray scintillation mechanism in our hybrid scintillators could be extended to enhance the quantum yield of various types of scintillators, enabling low-dose radiation detection in various fields, including fundamental science and imaging.

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“…Most importantly, both nanostructured polymers show a clearly higher emission intensity than the solvent-free DPA * reference (LY = 250 ± 60 ph MeV −1 ), which highlights that the solvent droplets may play a crucial role in the conversion of the energy of ionized free charges into emissive states by reducing nonradiative losses during the energy transfer toward the conjugated dyes. [29,30] Figure 2g, which shows the decay of scintillation light pulses at 430 nm generated by 14.5 keV pulsed X-ray excitation (Experimental Section), reveals that the different materials investigated also display dissimilar scintillation kinetics. The emission intensity in solvent-free DPA * decays according to a single exponential function with a lifetime (≈10 ns) that mirrors the photoluminescence decay.…”

Section: Resultsmentioning

confidence: 99%

Sensitized Triplet–Triplet Annihilation in Nanostructured Polymeric Scintillators Allows for Pulse Shape Discrimination

Hu,

Rigamonti,

Villa

et al. 2024

Advanced Materials

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Scintillating materials emit light when exposed to ionizing radiation or particles and are employed for the detection of nuclear threats, medical imaging, high‐energy physics, and other usages. For some of these applications, it is vital to distinguish neutrons and charged particles from γ‐rays. This is achievable by pulse shape discrimination (PSD), a time‐gated technique, which exploits that the scintillation kinetics can depend on the nature of the incident radiation. However, it proved difficult to realize efficient PSD with plastic scintillators, which have several advantages over liquid or crystalline scintillating materials, including mechanical robustness and shapeability. We show here that sensitive and rapid PSD is possible with nanostructured polymer scintillators that consist of a solid polymer matrix and liquid nanodomains in which an organic dye capable of triplet‐triplet annihilation (TTA) is dissolved. The liquid nature of the nanodomains renders TTA highly efficient so that delayed fluorescence can occur at low energy density. The nanostructured polymer scintillators allow discriminating α particles, neutrons, and γ‐rays with a time response that is better than that of commercial scintillators. Exploiting that the liquid nanodomains can facilitate energy transfer processes that are otherwise difficult to realize in solid polymers, we incorporated an auxiliary triplet sensitizer. This approach further increases the scintillator's sensitivity towards α particles and neutrons and other high‐energy processes where localized interactions are involved.This article is protected by copyright. All rights reserved

show abstract

Preparation and performance study of a novel liquid scintillator with mixed solvent as the matrix

Cited by 8 publications

References 28 publications

Tuning the decay time of liquid scintillators

Tuning the decay time of liquid scintillators

Hybridisation of perovskite nanocrystals with organic molecules for highly efficient liquid scintillators

Sensitized Triplet–Triplet Annihilation in Nanostructured Polymeric Scintillators Allows for Pulse Shape Discrimination

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