Timing properties of radioluminescence in nanoparticle ZnS:Ag scintillators

Mann, S.E.; Schooneveld, E.M.; Rhodes, N.J.; Liu, D.; Sykora, G.J.

doi:10.1016/j.omx.2022.100226

Cited by 6 publications

(5 citation statements)

References 34 publications

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“…The effect of afterglow mechanisms on the overall luminescence behaviour are significantly reduced, as shown by the reductions in amplitude (from 29% to 17%) and decay time (from 2.16 µs to 129 ns) of the hyperbolic component. Possible reasons for faster decay in the nanoparticle scintillator, including reduced separation of traps and luminescence centres, and strongly localised excitons, are discussed in Mann et al [37]. This previous work reports the timing properties of alpha scintillation of the nanoparticle powder, as opposed to the neutron response of the scintillator screens shown here.…”

Section: Neutron Scintillation Decay Timementioning

confidence: 72%

“…PL is broadband and peaked at excitation and emission wavelengths of 356 nm and 568 nm respectively. The PL of commercial ZnS:Ag is reported in previous works; excitation and emission spectra of ZnS:Ag (NC2) powder are shown in [37], and a full excitationemission map of ZnS:Ag/ 6 LiF scintillator is presented in [31]. The nanoscintillator emission is shifted to significantly longer wavelengths with respect to the microscintillator, which has PL peaked at 450 nm.…”

Section: Nanoparticle Scintillator Propertiesmentioning

confidence: 95%

“…In previous work, nanoparticles of ZnS:Ag were demonstrated to have fast scintillation properties that indicated the material may have promise as a low afterglow alternative to commercial bulk ZnS:Ag [37]. When excited by alpha radiation, the average decay to 1% was measured to be approximately 20 times faster in nanoparticle ZnS:Ag than in the bulk counterpart.…”

Section: Introductionmentioning

confidence: 99%

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Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination

Mann,

Schooneveld,

Rhodes

et al. 2024

J. Phys. D: Appl. Phys.

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A neutron sensitive scintillator employing nanoparticles of ZnS:Ag has been developed for the first time. Pulse shape differences between neutron and gamma signals were observed in this material and neutron-gamma discrimination was applied. With initial signal processing parameters, gamma sensitivities of 8.5 × 10-6 to 60Co gammas were achieved. The average primary decay of neutron scintillation in nanoparticle ZnS:Ag/6LiF was measured to be 18ns, and afterglow was significantly suppressed in comparison to standard ZnS:Ag/6LiF scintillators that employ micron sized ZnS:Ag. Fast decay times and minimal afterglow indicate potential for use in high count rate capability applications. Prospective count rate capabilities were investigated here as proof of concept, with rates of 1.12Mcps measured for a single readout channel with less than 3.5% count loss. This is approximately 70 times greater than the count rate capability of the current standard ZnS:Ag/6LiF scintillation detectors. With improvements to signal processing and scintillator composition, nanoparticle ZnS:A/6LiF could be a promising candidate for future high rate capability neutron detectors.

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Section: Neutron Scintillation Decay Timementioning

confidence: 72%

Section: Nanoparticle Scintillator Propertiesmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination

Mann,

Schooneveld,

Rhodes

et al. 2024

J. Phys. D: Appl. Phys.

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“…For example, ZnS:Mn,Eu [9,10,16] and ZnS:Ag,Co [13] exhibit strong white luminescence, while the emissions of ZnS:Eu 2+ are highly determined by the particle size [17] . These properties offer excellent insight into adjusting the materials for different applications such as full-color displays for flexible electronics [18] .…”

Section: Introductionmentioning

confidence: 99%

Tuning Ag⁺ and Mn²⁺ doping in ZnS:Ag,Mn embedded polymers for flexible white light emitting films

Ma,

Amador,

Belev

et al. 2024

Soft Sci

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Flexible Light Emitting Diodes are versatile lighting solutions that offer bendable and adaptable illumination possibilities. A soft, flexible white luminescent film (1 mm) shows promise for foldable electroluminescent devices and applications. This film was fabricated using ZnS:Ag and Mn. Under different excitation wavelengths, the phosphors emit blue light due to Ag+ luminescence centers and red light from the d-d transition of Mn2+. The blue emission is greatly suppressed at high Mn2+ doping levels, requiring reduced Ag+ doping in co-doped ZnS:Ag,Mn compared to solo-doped ZnS:Ag samples. By adjusting Ag+ and Mn2+ concentrations, the ZnS:Ag(1%),Mn(0.2%) phosphors show a proper intensity ratio of blue and red emissions, making them a promising candidate for future white light applications.

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“…The selection of Cs 3 Cu 2 I 5 nanoparticles, Cs 4 CdBi 2 Cl 12 :Mn microcrystals, and Cu 2 I 2 nanoclusters as active materials was driven by their superior stability and unique photophysical properties, including high photoluminescence quantum yields (PLQY), large Stokes shifts, and high scintillation light yields (LYs). However, due to the compatibility of the polycarbonate (PC) matrix with various materials, the developed method can also be employed to incorporate other classes of materials, such as organic scintillators, − metal–organic frameworks, − and other inorganic scintillators, − into composite fibers, thereby expanding the range of potential applications.…”

mentioning

confidence: 99%

Multimaterial Fibers with Nanoemitters Enable Conformal X-ray Imaging with 3D Printed and Woven Scintillators

Saidzhonov,

Yorov,

Yuan

et al. 2024

ACS Materials Lett.

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Multimaterial luminescent fibers featuring integrated organic, inorganic, or hybrid nanoemitters are essential elements within a multitude of photonic systems. These systems encompass critical applications, such as single photon sources, high-energy radiation and particle sensors, and wireless optical communication networks. However, the integration of highly efficient luminescent nanomaterials into fibers with predefined geometries, materials, and functionalities remains challenging. This work reports on a process for fabricating indefinitely long multimaterial polymer fibers that can be doped with different organic−inorganic hybrid emitters, such as Cs 3 Cu 2 I 5 nanoparticles, Cu 2 I 2 nanoclusters, and Mn-doped Cs 4 CdBi 2 Cl 12 phosphors. This versatility allows for the creation of fibers with tunable emission colors, which enable the realization of largearea, high-performance scintillation surfaces by additive manufacturing, weaving, or rolling. These conformal scintillator screens have been used to demonstrate X-ray imaging of nonplanar complex shapes without the image distortion and resolution degradation associated with rigid planar scintillator configurations. Additive manufacturing of sophisticated threedimensional scintillators with nanoemitters offers opportunities for personalized medical imaging platforms, particularly for breast cancer screening, as well as applications in large-area high-energy radiation and particle detection.

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Timing properties of radioluminescence in nanoparticle ZnS:Ag scintillators

Cited by 6 publications

References 34 publications

Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination

Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination

Tuning Ag⁺ and Mn²⁺ doping in ZnS:Ag,Mn embedded polymers for flexible white light emitting films

Multimaterial Fibers with Nanoemitters Enable Conformal X-ray Imaging with 3D Printed and Woven Scintillators

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Timing properties of radioluminescence in nanoparticle ZnS:Ag scintillators

Cited by 6 publications

References 34 publications

Nanoparticle ZnS:Ag/6LiF—a new high count rate neutron scintillator with pulse shape discrimination

Nanoparticle ZnS:Ag/6LiF—a new high count rate neutron scintillator with pulse shape discrimination

Tuning Ag+ and Mn2+ doping in ZnS:Ag,Mn embedded polymers for flexible white light emitting films

Multimaterial Fibers with Nanoemitters Enable Conformal X-ray Imaging with 3D Printed and Woven Scintillators

Contact Info

Product

Resources

About

Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination

Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination

Tuning Ag⁺ and Mn²⁺ doping in ZnS:Ag,Mn embedded polymers for flexible white light emitting films