Scintillation Properties of SrHfO/sub 3/:Ce/sup 3+/ and BaHfO/sub 3/:Ce/sup 3+/ Ceramics

Loef, E.V.D. van; Higgins, William E.; Głodo, J.; Brecher, C.; Lempicki, Alex; Venkataramani, Venkat; Moses, W.W.; Derenzo, Stephen E.; Shah, K.S.

doi:10.1109/nssmic.2006.354191

Cited by 2 publications

(1 citation statement)

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“…Hf- or Ta-based materials have potential as novel scintillation materials with no intrinsic background noise, high density, and high effective atomic number, and some groups including us reported the Ce-doped SrHfO 3 group to have a fast decay time of approximately 42 ns, high density of 7.65 g/cm 3 , and high effective atomic number. − Although Hf- or Ta-based materials are attractive ones for the PET application, the single-crystal growth of Hf- or Ta-based crystals is hard by the conventional melt growth techniques such as the micropulling down (μ-PD) method and Czochralski method , due to the higher melting point (mp) compared to the softening or melting point of the crucibles. Here, Ir is often used as a crucible, and its melting point is about 2466 °C.…”

Section: Introductionmentioning

confidence: 99%

Novel Method of Search for Transparent Optical Materials with Extremely High Melting Point

Kurashima

Kurosawa

Murakami

et al. 2020

Crystal Growth & Design

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We propose a novel crystal growth method, “Core Heating (CH) Method”, which is suitable for a search of novel materials with extremely high melting points above the melting (softening) point of an Ir crucible. As a feasibility test of the novel CH method, we fabricated the conventional material, (Y0.99Ce0.01)3Al5O12 (Ce:YAG), with a melting point of ∼1970 °C, because this material can be grown by the conventional melt growth technique like the micropulling down (μ-PD) method for the comparison. We compared scintillation properties for Ce:YAG prepared by the CH and μ-PD methods in order to find if the CH method can be applied to the material search. The crystals grown by both methods showed the YAG single-phase, and almost all their optical and scintillation properties of them were comparable for both samples. Particularly, the light output of Ce:YAG crystal grown by the CH method (20,000 ± 1,000 photons/MeV) was similar to that of the sample grown by the μ-PD method (23,000 ± 1,000 photons/MeV). Therefore, we concluded that the CH method is a useful technique for the search of scintillation materials with extremely high melting points.

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Section: Introductionmentioning

confidence: 99%

Novel Method of Search for Transparent Optical Materials with Extremely High Melting Point

Kurashima

Kurosawa

Murakami

et al. 2020

Crystal Growth & Design

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Unusual Photoluminescence of CaHfO₃ and SrHfO₃ Nanoparticles

Rauwel

Galeckas

Rauwel

et al. 2011

Adv Funct Materials

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This article reports on optical properties of SrHfO3 and CaHfO3 nanoparticles with sizes as small as 1.6 nm, synthesized via non aqueous sol–gel routs for the first time. An unexpectedly strong luminescence from the undoped nanoparticles was observed in the visible spectrum over a wide temperature range, also exhibiting sensitivity to temperature variation and surrounding ambient (vacuum/air) and exposure time to UV light. A tentative model is proposed to explain these phenomena in terms of luminescent centers located at the surface of the nanoparticles.

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Scintillation Properties of SrHfO/sub 3/:Ce/sup 3+/ and BaHfO/sub 3/:Ce/sup 3+/ Ceramics

Cited by 2 publications

References 2 publications

Novel Method of Search for Transparent Optical Materials with Extremely High Melting Point

Novel Method of Search for Transparent Optical Materials with Extremely High Melting Point

Unusual Photoluminescence of CaHfO₃ and SrHfO₃ Nanoparticles

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Scintillation Properties of SrHfO/sub 3/:Ce/sup 3+/ and BaHfO/sub 3/:Ce/sup 3+/ Ceramics

Cited by 2 publications

References 2 publications

Novel Method of Search for Transparent Optical Materials with Extremely High Melting Point

Novel Method of Search for Transparent Optical Materials with Extremely High Melting Point

Unusual Photoluminescence of CaHfO3 and SrHfO3 Nanoparticles

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Unusual Photoluminescence of CaHfO₃ and SrHfO₃ Nanoparticles