Growth and scintillation properties of Eu-doped LiCl/Li2SrCl4 eutectic scintillator for neutron detection

Kutsuzawa, Naoko; Takizawa, Yui; Kamada, Kei; Yoshino, Masao; Kim, Kyoung Jin; Murakami, Rikito; Shoji, Yasuhiro; Kochurikhin, Vladimir V.; Yoshikawa, Akira

doi:10.1016/j.jcrysgro.2021.126373

Cited by 11 publications

(7 citation statements)

References 17 publications

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“…This eutectic scintillator allows for a higher concentration of 6 Li than conventional single-crystal scintillators, thereby increasing the sensitivity to thermal neutrons. Our group has developed eutectic scintillators for thermal neutron detection, such as Ce 3+activated bromide of CeBr 3 / 6 LiBr [13] and Eu 2+ -activated chlorides of Eu:BaCl 2 / 6 LiCl [14] and Eu: 6 Li 2 SrCl 4 / 6 LiCl [15]. Some of them have been reported to exceed the scintillator properties of conventional single-crystal scintillators in terms of 6 Li concentration and light yield.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of K2CeCl5/6LiCl and CeCl3/SrCl2/6LiCl Eutectics for Thermal Neutron Detection

et al. 2022

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In recent years, thermal neutron detection using scintillators has been used in a wide range of fields. Thus, the development of scintillators with a higher light yield, faster decay, and higher sensitivity for thermal neutrons is required. In this study, K2CeCl5/6LiCl and CeCl3/SrCl2/6LiCl were developed as novel eutectic scintillators for thermal neutron detection. LiCl was selected as the neutron capture phase and K2CeCl5 and CeCl3 were used as the scintillator phases. The eutectics of K2CeCl5/6LiCl and CeCl3/SrCl2/6LiCl were prepared using the Vertical Bridgman method and the phases were identified by scanning electron microscopy and powder X-ray diffraction measurements. The results of radioluminescence measurements under Ag source X-ray tube irradiation confirmed that the 5d-4f emission derived from Ce3+. The cathodoluminescence spectra and thermal neutron responses of the prepared eutectics were measured to evaluate their optical properties.

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Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of K2CeCl5/6LiCl and CeCl3/SrCl2/6LiCl Eutectics for Thermal Neutron Detection

et al. 2022

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“…As the smaller bandgap of scintillation phase may provide higher efficiency due to smaller energy required to create an electron–hole pair, apart from the reports dealing with chloride eutectic compositions, such as LiCl–BaCl 2 :Eu 2+ , [ 283 ] LiCl/Li 2 SrCl 4 :Eu 2+ , and [ 69 ] LiCl–CeCl 3 , [ 284 ] those based on bromides, such as Ce:LaBr 3 /AEBr 2 (AE ═ Mg, Ca, Sr, Ba) [ 68 ] and LiBr/LaBr 3 :Ce, [ 285 ] or iodides as BaI 2 /LuI 3 :Ce [ 286 ] or Eu‐doped LiSrI 3 /LiI, [ 287 ] were published as well. The highest LY was reported in, [ 285 ] 74 000 ph per neutron, which is much superior to presently available commercial single‐crystal scintillators for thermal neutron detection.…”

Section: Microstructured Halide Scintillatorsmentioning

confidence: 99%

“…However, only the latter one is perfectly suitable for growth of hygroscopic halides as it prevents any contact with ambient atmosphere. In this way, various single crystals of halide scintillators were prepared, for instance, NaI:Tl, [64] SrI 2 :Eu, [51,65,66] LaBr 3 :Ce, and [67,68] various ternary and mixed halides and eutectics: 6 LiCl/ 6 Li 2 SrCl 4 , [69] Tl 2 LaCl 5 :Ce, [70] KSr 2 I 5 :Eu, [71] Cs 2 HfCl 6 , [8,72,73] Cs 3 Cu 2 I 5 , [53,74] Ba 2 CsI 5 :Eu, [75] BaBrI:Eu. [76] The Czochralski (CZ) method is another crystal growth technique widely used in the R&D and commercial production of large-sized single crystals.…”

Section: Bulk Crystal Growth Of Halide Materialsmentioning

confidence: 99%

Advanced Halide Scintillators: From the Bulk to Nano

Vaněček

Děcká

Mihóková

et al. 2022

Advanced Photonics Research

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Halide scintillators have been playing a crucial role in the detection of ionizing radiation since the discovery of scintillation in NaI:Tl in 1948. The discovery of NaI:Tl motivated the research and development (R&D) of halide scintillators, resulting in the development of CsI:Tl, CsI:Na, CaF2:Eu, etc. Later, the R&D shifted toward oxide materials due to their high mechanical and chemical stability, good scintillation properties, and relative ease of bulk single‐crystal growth. However, the development in crystal growth technology allows for the growth of high‐quality single crystals of hygroscopic and mechanically fragile materials including SrI2 and LaBr3. Scintillators based on these materials exhibit excellent performance and push the limits of inorganic scintillators. These results motivate intense research of a large variety of halide‐based scintillators. Moreover, materials based on lead halide perovskites find applications in the fields of photovoltaics, solid‐state lighting, and lasers. The first studies show also the significant potential of lead halide perovskites as ultrafast scintillators in the form of nanocrystals. The purpose of this review is to summarize the R&D in the field of halide scintillators during the last decade and highlight perspectives for future development.

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“…Fiber-structured scintillators [4,5] provide one possible method to improve the scintillator plate. These are promising materials for high-resolution Xray imaging detectors as well as alpha cameras [6,7] or gamma cameras [8,9], and fiber-based scintillator is now becoming the new active research field in scintillator development [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

A high-resolution X-ray microscope system for performance evaluation of scintillator plates

et al. 2022

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In the development of new scintillators for X-ray imaging, a high-resolution and highly efficient system is required to evaluate the performance of the scintillator plates. For this purpose, we developed a high-resolution X-ray microscope system. The developed compact X-ray microscope system is based on a magnifying unit and a cooled charge-coupled device (CCD) camera, combined with a small industrial X-ray irradiation system. Using this system, we carried out imaging of three scintillator plates and evaluated their spatial resolution. Each scintillator plates was set in front of the lens of the objective, X-rays were irradiated to the scintillator plates, and transmission images of masks were acquired. The measured spatial resolution of the scintillator plates varied from 16 μm to 30 μm, depending on the type of scintillator plate. The focus size of the X-ray tube had an almost negligible effect on the spatial resolution of the images for the evaluated scintillator plates.

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Growth and scintillation properties of Eu-doped LiCl/Li2SrCl4 eutectic scintillator for neutron detection

Cited by 11 publications

References 17 publications

Fabrication and Characterization of K2CeCl5/6LiCl and CeCl3/SrCl2/6LiCl Eutectics for Thermal Neutron Detection

Fabrication and Characterization of K2CeCl5/6LiCl and CeCl3/SrCl2/6LiCl Eutectics for Thermal Neutron Detection

Advanced Halide Scintillators: From the Bulk to Nano

A high-resolution X-ray microscope system for performance evaluation of scintillator plates

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