Gamma-radiation effects on luminescence properties of Eu3+ activated LaPO4 phosphor

Vujčić, Ivica; Gavrilović, Tamara V.; Sekulić, Milica; Mašić, Slobodan; Putić, Slaviša; Papan, Jelena; Dramićanin, Miroslav D.

doi:10.1016/j.nimb.2018.03.002

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…Steady state and time-resolved emission spectroscopy (TRES) of the Eu 3+ -doped CeO2 films before and after 100 kGy γ irradiation demonstrated a negligible effect on the coordination environment or lifetime of emission decay of Eu 3+ within the samples (see Figure 5 for example), though a similar reduction in Eu 3+ emission intensity reported by Vujčić et al was observed [63], possibly arising from radicals produced by irradiation quenching the emission and possibly forming Eu 2+ . The results presented here were collected using time gated detection to eliminate the background interference caused by the polymer template.…”

Section: Effect Of Dopants and Irradiation On Chemical Environmentssupporting

confidence: 70%

The Effects of Irradiation on Structure and Leaching of Pure and Doped Thin-Film Ceria SIMFUEL Models Prepared via Polymer-Templated Deposition

Holdsworth,

Feng,

Edge

et al. 2024

JNE

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When studying hazardous materials such as spent nuclear fuel (SNF), the minimisation of sample volumes is essential, together with the use of chemically-similar surrogates where possible. For example, the bulk behaviour of urania (UO2) can be mimicked by appropriately-engineered thin films of sufficient thickness, and inactive materials such as ceria (CeO2) can be used to study the effects within radioactive systems used to fuel nuclear fission. However, thin film properties are sensitive to the preparative method, many of which require the use of highly toxic precursors and specialised apparatus (e.g., chemical vapour deposition). To address this, we present the development of a flexible, tuneable, scalable method for the preparation of thin-film CeO2 SIMFUEL models with a thickness of ≈5 μm. The effects of γ irradiation (up to 100 kGy) and dopants including trivalent lanthanides (Ln3+) and simulant ε-particles on the structure and long-term leaching of these systems under SNF storage conditions were explored, alongside the context of this within further work. It was found that the sensitivity of CeO2 films to reduction upon irradiation, particularly in the presence of simulant ε-particles, resulted in increased leaching of Ce (as CeIII), while trivalent lanthanides (Nd3+ and Eu3+) had a minimal effect on Ce leaching.

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Section: Effect Of Dopants and Irradiation On Chemical Environmentssupporting

confidence: 70%

The Effects of Irradiation on Structure and Leaching of Pure and Doped Thin-Film Ceria SIMFUEL Models Prepared via Polymer-Templated Deposition

Holdsworth,

Feng,

Edge

et al. 2024

JNE

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“…Time-resolved laser fluorescence spectroscopy (TRLFS) of the Eu-doped CeO 2 films before and after 100 kGy γ irradiation demonstrated negligible effect on the coordination environment or lifetime of emission decay of Eu within the samples (see Figure 5 for example), though the similar reduction in Eu emission intensity reported by Vujčić et al is observed, (Vujčić et al, 2018) possibly arising from radicals, produced by irradiation, quenching the emission. The results presented here were collected using gated detection to eliminate the background interference caused by the polymer template.…”

Section: 23: Effect Of Dopants and Irradiation On Chemical Environmentssupporting

confidence: 68%

The Effects of Irradiation on Structure and Leaching of Pure and Doped Thin-Film Ceria SIMFUEL Models Prepared via Polymer-Templated Deposition

Holdsworth,

Feng,

Edge

et al. 2024

Preprint

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When studying hazardous materials such as spent nuclear fuel (SNF), minimisation of sample volumes is essential, together with the use of chemically-similar surrogates where possible. For example, the bulk behaviour of urania (UO2) can be mimicked by appropriately-engineered thin films of sufficient thickness and inactive materials such as ceria (CeO2) can be used to study effects within radioactive systems used to fuel nuclear fission. However, thin film properties are sensitive to the preparative method, many of which require the use of highly toxic precursors and specialised apparatus e.g. chemical vapour deposition. To address this, we present the development of a flexible, tuneable, scalable method for the preparation of thin-film CeO2 SIMFUEL models with a thickness of ≈ 5 μm. The effects of γ irradiation (up to 100 kGy) and dopants including trivalent lanthanides (Ln3+) and simulant ε-particles on the structure and long-term leaching of these systems under SNF storage conditions are explored, alongside the context of this within further work. It was found that the sensitivity of CeO2 films to reduction upon irradiation, particularly in the presence of simulant ε-particles results in increased leaching of Ce (as CeIII), while trivalent lanthanides (Nd3+ and Eu3+) have minimal effect on Ce leaching.

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“…Because no scintillator can fulfill all of the requirements above, users select suitable scintillators for each application, and many kinds of scintillators have been developed. [9][10][11][12][13][14][15][16] Recently, hafnium oxides have been synthesized as candidates for scintillators because their high ρ is attractive. [17][18][19] CaHfO 3 has a high ρ (6.9 g cm −3 ) and a high Z eff (65.2).…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence and scintillation properties of Ti-doped CaHfO₃ crystals

Fukushima¹,

Nakauchi²,

Kawaguchi³

et al. 2019

Jpn. J. Appl. Phys.

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Ti-doped CaHfO 3 crystals were synthesized by the floating zone method equipped with xenon arc lamps, and the photoluminescence (PL) and scintillation properties are investigated. Ti-doped CaHfO 3 crystals emit strong blue photons under UV irradiation. The PL and scintillation signals are observed around 410 nm due to the charge transfer related to Ti 4+ . The PL and scintillation decay time constants are approximately 1 μs, which is relatively shorter than other Ti-doped materials. The scintillation light yield of Ti-doped CaHfO 3 crystals is estimated by the pulse height measurement under 137 Cs gamma-ray irradiation. The 1.0% Ti-doped sample shows the highest scintillation light yield (3400 photons/MeV) among the present samples.

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Gamma-radiation effects on luminescence properties of Eu3+ activated LaPO4 phosphor

Cited by 7 publications

References 35 publications

The Effects of Irradiation on Structure and Leaching of Pure and Doped Thin-Film Ceria SIMFUEL Models Prepared via Polymer-Templated Deposition

The Effects of Irradiation on Structure and Leaching of Pure and Doped Thin-Film Ceria SIMFUEL Models Prepared via Polymer-Templated Deposition

The Effects of Irradiation on Structure and Leaching of Pure and Doped Thin-Film Ceria SIMFUEL Models Prepared via Polymer-Templated Deposition

Photoluminescence and scintillation properties of Ti-doped CaHfO₃ crystals

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Gamma-radiation effects on luminescence properties of Eu3+ activated LaPO4 phosphor

Cited by 7 publications

References 35 publications

The Effects of Irradiation on Structure and Leaching of Pure and Doped Thin-Film Ceria SIMFUEL Models Prepared via Polymer-Templated Deposition

The Effects of Irradiation on Structure and Leaching of Pure and Doped Thin-Film Ceria SIMFUEL Models Prepared via Polymer-Templated Deposition

The Effects of Irradiation on Structure and Leaching of Pure and Doped Thin-Film Ceria SIMFUEL Models Prepared via Polymer-Templated Deposition

Photoluminescence and scintillation properties of Ti-doped CaHfO3 crystals

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Photoluminescence and scintillation properties of Ti-doped CaHfO₃ crystals