Scintillation materials for neutron imaging detectors

Katagiri, Masaki; Sakasai, K.; Matsubayashi, Masahito; Nakamura, Tatsuya; Kondo, Yasuhiko; Chujo, Yoshiki; Nanto, Hidehito; Kojima, T

doi:10.1016/j.nima.2004.04.165

Cited by 41 publications

(19 citation statements)

References 3 publications

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“…Two pulse height peaks can, however, be clearly seen in the spectra of the two nanocomposite samples, which will benefit future neutron-gamma discrimination. BC704 has no clear pulse peak as reported previously (Clergeau, 2002;Katagiri, 2004a), due to strong absorption and scattering to its own scintillation light. Li-glass (Clergeau, 2002), have better energy resolution than microparticle ZnS:Ag/ 6 LiF scintillator; though, PartTec agrees that the light yields of these nanocomposites need to be improved.…”

Section: Neutron Testssupporting

confidence: 56%

Next Generation Neutron Scintillators Based on Semiconductor Nanostructures

Wang¹

2008

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Section: Neutron Testssupporting

confidence: 56%

Next Generation Neutron Scintillators Based on Semiconductor Nanostructures

Wang¹

2008

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“…Details of the preparation of sintered ZnO phosphors have been reported in previous papers. (16)(17)(18) As for the crystallinity measurement of the ZnO phosphors, their crystallographic structure was evaluated using an X-ray diffraction (XRD) apparatus (Rigaku Electric Co. Ltd., Model: RINT2000, Cu target, 40 kV/30 mA). Photoluminescence (PL) spectra caused by excitation with UV light (330 nm) were observed using a Hitachi F-3010 spectrofluorometer at room temperature.…”

Section: Methodsmentioning

confidence: 99%

Luminescence Properties of Impurity-Doped Zinc Oxide Phosphor for Novel Neutron Detection

2016

Sensors and Materials

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A neutron detection sheet composed of Ag-doped zinc sulfide (ZnS) as a scintillator and 6 LiF as a neutron converter has been conventionally used for neutron detection, and as an imaging detector using the photon counting method, because of its high luminescence rate for neutrons. However, the weak point in a Ag-doped ZnS scintillator is the slow component of its lifetime. Thus, we began to investigate other II-VI compound phosphors without the slow component of its lifetime for neutron detectors using the photon counting method. In this study, Cu-, In-, Al-, and Gaimpurity-doped ZnO phosphors without the slow component of lifetime for neutron detectors at a high counting rate have been fabricated using a spark plasma sintering method. It was found that Ga-doped ZnO exhibited the highest intensity of luminescence at a wavelength of 383 nm. The intensity of the 383 nm luminescence due to exciton emission with a lifetime of about 4 ns was comparable to that of the Ag-doped ZnS phosphor with a lifetime of about 220 ns, indicating that the Ga-doped ZnO phosphor could be used as a promising phosphor material for a neutron image sensor. It was also found that the luminescence intensity of the Ga-doped ZnO phosphor samples did not decrease when B 2 O 3 was added as a neutron-alpha (n, alpha) converter. It was confirmed that a Ga-doped ZnO scintillator with B 2 O 3 converter responds to the neutron beam emitted by the Japan Research Reactor-3 (JRR-3).

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“…(12) As mentioned above, many inorganic single-crystal scintillators are applied in various fields. In addition, some materials such as glass scintillators (e.g., Li glass), (13) plastic scintillators (e.g., BC452), (14) organic liquid scintillators (e.g., BC505), (15) and ceramic scintillators (e.g., Gd 2 O 2 S:Pr) (16) are also used in practice.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence and Scintillation Properties of Organic–Inorganic Perovskite-type Compounds with Bromophenethylamine

Horimoto¹,

Kawano²,

Nakauchi³

et al. 2020

Sensors and Materials

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BrC 6 H 4 C 2 H 4 NH 3) 2 PbBr 4 (n-BrPhe) (n = 2, 3, 4) single crystals were synthesized with the aim of enhancing the scintillation light yield of (C 6 H 5 C 2 H 4 NH 3) 2 PbBr 4 (Phe), and their photoluminescence (PL) and scintillation characteristics were evaluated. A sharp PL peak due to the exciton emissions from the inorganic layer was observed at 390-420 nm in the n-BrPhe samples. They had lifetimes of 4.7 ns (2-BrPhe), 2.1 ns (3-BrPhe), and 0.9 ns (4-BrPhe) owing to the exciton recombination in the inorganic layer under 340 nm excitation. Regarding scintillation, a sharp peak due to exciton emissions from the inorganic layer was detected at 410-440 nm under X-ray irradiation, and the decay time constants under X-ray irradiation were 2.3 ns (2-BrPhe), 2.0 ns (3-BrPhe), and 2.1 ns (4-BrPhe). Moreover, the scintillation light yields under gamma-ray irradiation from 241 Am (59.5 keV) were found to be 3100 (2-BrPhe), 2200 (3-BrPhe), and 5900 photons/MeV (4-BrPhe), which were lower than that of Phe (18000 photons/MeV).

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Scintillation materials for neutron imaging detectors

Cited by 41 publications

References 3 publications

Next Generation Neutron Scintillators Based on Semiconductor Nanostructures

Next Generation Neutron Scintillators Based on Semiconductor Nanostructures

Luminescence Properties of Impurity-Doped Zinc Oxide Phosphor for Novel Neutron Detection

Photoluminescence and Scintillation Properties of Organic–Inorganic Perovskite-type Compounds with Bromophenethylamine

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