Dosimetric properties of non-doped LiF/CaF2 eutectic

Kawaguchi, Noriaki; Kimura, Hiromi; Takebuchi, Yuma; Nakauchi, Daisuke; Kato, Takumi; Yanagida, Takayuki

doi:10.1016/j.radmeas.2020.106254

Cited by 6 publications

(13 citation statements)

References 18 publications

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“…In the contrast, the non-doped LiF/CaF 2 eutectic composite have shown the emission with self-trapped exciton (STE) in CaF 2 . 22) It is considered that Tb 3+ ions substitute Ca 2+ sites and the STE emission is quenched.…”

Section: Resultsmentioning

confidence: 99%

“…This temperature profile is the same as that for the non-doped LiF/CaF 2 eutectic composite in the previous report. 22) The obtained eutectic is polished to a thickness of approximately 2 mm and it is used as the sample for investigation on the luminescence and dosimetric properties.…”

Section: Methodsmentioning

confidence: 99%

“…The reason why CaSO 4 :Tm was selected was that it has relatively high TL intensity among well-known TL dosimetric materials. 19) The non-doped LiF/CaF 2 eutectic composite, that had been obtained in the previous study, 22) was also used for the reference sample.…”

Section: Methodsmentioning

confidence: 99%

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Dosimetric properties of Tb-doped LiF/CaF<sub>2</sub> eutectic composite

Kawaguchi

Kimura

Nakauchi

et al. 2021

J. Ceram. Soc. Japan

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We have developed a LiF/CaF 2 :Tb eutectic composite as a novel thermoluminescence (TL) dosimetric material. The LiF/CaF 2 :Tb eutectic composite was obtained using a melt-solidification method with a lower melting temperature than that of LiF and CaF 2 . The results of the PL emission and excitation spectra, the X-ray induced radioluminescence decay curve, and the TL emission spectrum indicate that the emissions of LiF/CaF 2 :Tb eutectic composite are due to 4f-4f transitions of the Tb 3+ ion. The integrated TL intensity of the LiF/CaF 2 :Tb eutectic composite was 3.6 times higher than that of the commercial CaSO 4 :Tm dosimetric material that is known to show a relatively high TL intensity. The dose response curve of the LiF/CaF 2 :Tb eutectic composite was measured and the lower detection limit was 0.01 mGy which is the lowest value among the LiF/CaF 2 based composites.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Dosimetric properties of Tb-doped LiF/CaF<sub>2</sub> eutectic composite

Kawaguchi

Kimura

Nakauchi

et al. 2021

J. Ceram. Soc. Japan

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“…Studies on materials for scintillators and dosimetric materials have been intensively performed over the past decades. (2)(3)(4)(5)(6)(12)(13)(14)(15) This area of research is still attractive and recent studies have reported on various types of materials such as single crystals, (17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29) glasses, (30)(31)(32)(33)(34)(35)(36)(37) sintered ceramics, (38)(39)(40)(41)(42)(43)(44)(45) eutectic composites, (46)(47)(48) organic materials, (49,50) and organic-inorganic hybrid materials. (51,52) Among these materials, glasses are interesting research targets due to the advantages of high formability, transparency, and degree of freedom of composition.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Ce-doped Li2O–ZnO–P2O5 Glasses for Thermal Neutron Detection

Kawaguchi¹,

Nakauchi²,

Kato³

et al. 2022

Sensors and Materials

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We have investigated the scintillation properties of Ce-doped Li 2 O-ZnO-P 2 O 5 glasses. The samples were prepared using a conventional melt-quenching method with low heating temperatures from 900 to 950 °C. All the samples showed halo patterns in their X-ray diffraction (XRD) patterns. In the X-ray-induced scintillation spectra, each sample showed a single emission peak that can be ascribed to luminescence due to the 5d-4f transitions of Ce 3+ ions. In the pulse height spectra of the samples, thermal neutron detection peaks were observed. Their light yields were estimated to be approximately 90-180 photons/neutron. Although the Cedoped Li 2 O-ZnO-P 2 O 5 glasses show low light yields, they can be regarded as thermal neutron scintillators that can be produced with low heating temperatures.

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“…There have been many studies on the properties of scintillators and dosimetric materials in the last several decades, (2)(3)(4)(5)(6)12) and research on both types of phosphor materials is still an attractive topic. As recent studies on scintillators and dosimetric materials, single crystals, (19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31) sintered ceramics, (32)(33)(34)(35)(36)(37) glasses, (38)(39)(40)(41)(42)(43) eutectics, (44,45) plastics, (46) and organic-inorganic hybrid materials (47) have been reported. Among them, glass materials have the advantages of high transparency, formability, and chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Scintillation Properties of Non-doped and Pr-doped BaO–B2O3–SiO2 Glasses and Glass-ceramics

Kawaguchi¹,

Masai²,

Akatsuka³

et al. 2021

Sensors and Materials

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We have studied the scintillation properties of non-doped and Pr-doped BaO-B 2 O 3 -SiO 2 glasses and glass-ceramics. The glass transition temperature (T g ), the temperature of crystallization onset (T x ), and the crystallization peak (T p ) were determined by differential thermal analysis. The glass-ceramics were obtained by heating at three different temperatures (T g + 50 °C, T x , and T p ). We confirmed that the X-ray diffraction peaks can be ascribed to the BaSiO 3 crystalline phase in the glass-ceramic samples. In the X-ray-induced scintillation spectra, we observed the intrinsic luminescence of the host glass and luminescence due to the 4f-4f transition of Pr 3+ ions. In addition, the 1% Pr-doped BaO-B 2 O 3 -SiO 2 glass-ceramic with heating at T g + 50 °C clearly showed luminescence in the wavelength range from 250 to 350 nm under X-ray excitation. Its photoluminescence (PL) decay time was estimated to be 26.28 ns and its luminescence is considered to be due to the 5f-4f transition of Pr 3+ ions.

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Dosimetric properties of non-doped LiF/CaF2 eutectic

Cited by 6 publications

References 18 publications

Dosimetric properties of Tb-doped LiF/CaF<sub>2</sub> eutectic composite

Dosimetric properties of Tb-doped LiF/CaF<sub>2</sub> eutectic composite

Characterization of Ce-doped Li2O–ZnO–P2O5 Glasses for Thermal Neutron Detection

Scintillation Properties of Non-doped and Pr-doped BaO–B2O3–SiO2 Glasses and Glass-ceramics

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