LiF/CsI:Tl Scintillator for High-Resolution Neutron Imaging

Miller, Stuart; Marshall, Matthew S. J.; Wart, Megan; Bilheux, Hassina Z.; Santodonato, Louis J.; Riedel, Richard A.; Nagarkar, Vivek V.

doi:10.1109/tns.2019.2940915

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…More recently, Miller et al deposited a neutron-sensitive 6 LiF layer on the self-growth arrayderived array layer and demonstrated the application of neutron imaging. [68] In this composite array structure, a 6 LiF layer with a thickness of 60-90 nm was deposited on top of the microcolumnar scintillating film to convert incident neutron into secondary charged particles. The sample displayed a high light yield (≈100 000 ph per neutrons) and neutron/gamma pulse shape discrimination ability with an FOM of 2.8.…”

Section: Self-growth Array-derived Structured Scintillatorsmentioning

confidence: 99%

Structured Scintillators for Efficient Radiation Detection

Lin

Yang

et al. 2021

Advanced Science

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Scintillators, which can convert high‐energy ionizing radiation into visible light, have been serving as the core component in radiation detectors for more than a century of history. To address the increasing application demands along with the concern on nuclear security, various strategies have been proposed to develop a next‐generation scintillator with a high performance in past decades, among which the novel approach via structure control has received great interest recently due to its high feasibility and efficiency. Herein, the concept of “structure engineering” is proposed for the exploration of this type of scintillators. Via internal or external structure design with size ranging from micro size to macro size, this promising strategy cannot only improve scintillator performance, typically radiation stopping power and light yield, but also extend its functionality for specific applications such as radiation imaging and therapy, opening up a new range of material candidates. The research and development of various types of structured scintillators are reviewed. The current state‐of‐the‐art progresses on structure design, fabrication techniques, and the corresponding applications are discussed. Furthermore, an outlook focusing on the current challenges and future development is proposed.

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Section: Self-growth Array-derived Structured Scintillatorsmentioning

confidence: 99%

Structured Scintillators for Efficient Radiation Detection

Lin

Yang

et al. 2021

Advanced Science

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“…3 He, 10 B, and 6 Li are typical efficient thermal neutron converters and have been integrated into neutron detectors in a variety of ways. [14][15][16][17] These cross-sections are large for thermal neutron nuclear reactions, which are dominated by inelastic scattering; however, they are much smaller in the fast neutron energy region (Figure 1a). Fast neutrons provide high energies and large penetration depths, and their interactions with matter are dominated by elastic scattering.…”

Section: Introductionmentioning

confidence: 99%

Synergy of Organic and Inorganic Sites in 2D Perovskite for Fast Neutron and X‐Ray Imaging

Shao

et al. 2023

Adv Funct Materials

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Fast neutron and X‐ray imaging are considered complementary nondestructive detection technologies. However, due to their opposite cross‐sections, development of a scintillator that is sensitive to both fast neutrons and X‐rays within a single‐material framework remains challenging. Herein, an organic–inorganic hybrid perovskite (C4H9NH3)2PbBr4 (BPB) is demonstrated as a scintillator that fully meets the requirements for both fast neutron and X‐ray detection. The hydrogen‐rich organic component acts as a fast neutron converter and produces detectable recoil protons. The heavy atom‐rich inorganic fraction efficiently deposits the energy of charged recoil protons and directly provides a large X‐ray cross‐section. Due to the synergy of these organic and inorganic components, the BPB scintillator exhibits high light yields (86% of the brightness of a commercial ZnS (Ag)/6LiF scintillator for fast neutrons; 22 000 photons per MeV for X‐rays) and fast response times (τdecay = 10.3 ns). More importantly, energy‐selective fast neutron and X‐ray imaging are also demonstrated, with high resolutions of ≈1 lp mm−1 for fast neutrons and 17.3 lp mm−1 for X‐rays; these are among the highest resolution levels for 2D perovskite scintillators. This study highlights the potential of 2D perovskite materials for use in combined fast neutron and X‐ray imaging applications.

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“…For cold or thermal neutron imaging, the columnar CsI:Tl can be combined with a neutron converter such as 10 B that absorbs neutrons to produce an alpha and a lithium ion. Previously we have shown that 6 LiF can be effectively combined with CsI:Tl for thermal neutron radiography [5]. 10 B is of particular interest for high resolution neutron imaging for several reasons.…”

Section: Introductionmentioning

confidence: 99%

High-Resolution Thermal Neutron Imaging With ¹⁰Boron/CsI:Tl Scintillator Screen

Miller

Marshall

Wart

et al. 2020

IEEE Trans. Nucl. Sci.

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Abstract-High resolution neutron imaging is difficult, due to the low-light output of neutron scintillators, and the spread of light within common neutron-sensitive scintillators as well as the spread of intermediate particles occurring during the detection process. To address this issue, we have developed a high-resolution scintillator for neutron imaging by combining enriched 10 B with the well-known CsI:Tl scintillator films. CsI:Tl has excellent properties for X-ray imaging applications, due to a high light yield of 60,000 photons/MeV, and high spatial resolution, which derives from its microcolumnar structure, which channels scintillation light to the photodetector. To enable CsI:Tl to detect neutrons, 10 B (96% enriched) was deposited by electron-beam directly onto the CsI:Tl film, making a layered scintillator structure in which the alphas produced by the neutron interaction with 10 B are detected in the CsI:Tl. The 10 B layer was approximately 3 µm thick, while the thickness of the CsI:Tl film was 11 µm. These novel layered scintillators were integrated into the high-resolution neutron imaging detector ('PSI Neutron Microscope') at the POLDI beamline at the Paul Scherer Institute (PSI). With our 10 B/CsI:Tl scintillator we were able to achieve a spatial resolution down to 9 µm. To demonstrate the effectiveness of the layered scintillator, we present results obtained by thermal neutron imaging as well as high-resolution neutron computed tomography. Finally, we believe there is considerable scope for future optimization of the performance of this system.

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LiF/CsI:Tl Scintillator for High-Resolution Neutron Imaging

Cited by 6 publications

References 7 publications

Structured Scintillators for Efficient Radiation Detection

Structured Scintillators for Efficient Radiation Detection

Synergy of Organic and Inorganic Sites in 2D Perovskite for Fast Neutron and X‐Ray Imaging

High-Resolution Thermal Neutron Imaging With ¹⁰Boron/CsI:Tl Scintillator Screen

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