Neutron-induced thermoluminescence properties of Tb3+-doped Ca2B2O5ceramics

Komiya, Hajime; Kawamura, Ichiro; Kawamoto, Hiroki; Fujimoto, Yutaka; Koshimizu, Masanori; Kimura, Hiromi; Okada, Go; Koba, Yusuke; Yanagida, Takayuki; Wakabayashi, Go; Asai, Keisuke

doi:10.35848/1347-4065/ac1c90

Cited by 9 publications

(2 citation statements)

References 30 publications

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“…10) In addition, many borate compounds with an impurity such as CaB 6 O 10 :Ce,LiCl and MgB 4 O 7 :Ce,Li are reported to exhibit efficient TSL and OSL. [11][12][13][14][15][16][17][18][19] Further, TSL characteristics of several borate chloride compounds have also been evaluated. Eu-doped Sr 2 B 5 O 9 Cl exhibits TSL with two glow peaks at about 77 °C and 222 °C, and its sensitivity is at least 70% that of a CaSO 4 :Dy.…”

Section: Introductionmentioning

confidence: 99%

Dosimetric properties of Mn²⁺-doped Ca₂BO₃Cl

Wauke

Koide

Kawano

et al. 2022

Jpn. J. Appl. Phys.

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We synthesized Ca2BO3Cl with various amounts of MnCl2 to fabricate phosphors for radiation dosimetry. After the synthesis, we evaluated their scintillation, thermally-stimulated luminescence (TSL), and optical stimulated luminescence (OSL) characteristics. A scintillation peak derived from the 4T1→6A1 transition of Mn2+ appeared at approximately 600 nm in the MnCl2-doped Ca2BO3Cl. Further, their decay time constants were approximately 0.13 ms that should be ascribed to the 4T1→6A1 transition. Moreover, the MnCl2-doped Ca2BO3Cl exhibited TSL glow peaks at approximately 85, 170, and 280 °C. The linear response of the 0.1% MnCl2-doped Ca2BO3Cl was confirmed in the X-ray dose range of 10–3000 mGy. In addition, a weak OSL peak derived from the 4T1→6A1 transition was detected at around 600 nm from the 0.1% and 0.5% MnCl2-doped Ca2BO3Cl.

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Section: Introductionmentioning

confidence: 99%

Dosimetric properties of Mn²⁺-doped Ca₂BO₃Cl

Wauke

Koide

Kawano

et al. 2022

Jpn. J. Appl. Phys.

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“…We previously prepared Tb 3+ -doped Ca 2 B 2 O 5 ceramics and evaluated their neutron detection properties as TL materials. 30) In this study, we prepared 10 B-enriched and 11 B-enriched samples of Dy-doped calcium borate (Ca 2 B 2 O 5 ) and evaluated their applicability as TL materials for neutron detection. Upon neutron irradiation, TL of the 10 B-enriched sample is induced by γ-rays released from 7 Li* from the 10 B(n, α) 7 Li* reaction and α-rays and 7 Li released from the 10 B(n, α) 7 Li and 10 B(n, α) 7 Li* reactions.…”

Section: Introductionmentioning

confidence: 99%

Thermoluminescence properties of Ca₂B₂O₅:Dy ceramics for neutron measurement

Komiya¹,

Kawamura²,

Kawamoto³

et al. 2022

Jpn. J. Appl. Phys.

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To develop thermoluminescent materials for neutron detection, 10B-enriched and 11B-enriched Ca2B2O5:Dy were prepared and their thermoluminescence (TL) properties were investigated after irradiation with X-rays, He ions and thermal neutrons. The TL of these materials was induced by X-rays and He ions and sensitivities to radiation are independent of the boron isotopes in the host materials. On the contrary, the TL intensity of the 10B-enriched sample was significantly higher than that of the 11B-enriched sample after irradiation with thermal neutrons. The high sensitivity to neutrons in the TL of the 10B-enriched sample is attributed to γ-rays and charged particles generated from 10B(n, α)7Li and 10B(n, α)7Li* reactions. In the neutron fluence range of the measurements (3.0 × 105 to 108 neutrons cm−2), the TL intensities attributed to 10B(n, α)7Li and 10B(n, α)7Li* reactions against thermal neutron fluence showed good linearity. In terms of detectable fluence, the new TL materials are more sensitive to neutrons than some existing Dy-containing TL materials.

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