New fast scintillators on the base of BaF2 crystals with increased light yield of 0.9ns luminescence for TOF PET

Seliverstov, D. M.; Demidenko, A. A.; Garibin, E. A.; Gain, S. D.; Gusev, Yu.; Федоров, П. П.; Kosyanenko, Sergey V.; Mironov, I. A.; Осико, В. В.; Родный, П. А.; Smirnov, Alexander; Suvorov, V.M.

doi:10.1016/j.nima.2011.11.080

Cited by 23 publications

(9 citation statements)

References 9 publications

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“…The emission peaks of ultrafast component at 195 and 220 nm due to core‐valence luminescence and the peak at 310 nm originated from the self‐trapped excitons were observed by Laval et al 7 In addition to the drawback of the slow luminescence component slowing down the temporal response, compared with other scintillation material (e.g., CaF 2 :Eu, 24,000 photons/MeV 8 ; pure SrF 2 , 30,000 photons/MeV 9 ), the light yield of the fast luminescence in BaF 2 crystal is not competitive (1500 photons/MeV 10 ), and the slow luminescence in BaF 2 crystal of that was reported as 9500–10,000 photons/MeV 11 . In the past few decades, the main researches focused on the suppression of slow luminescence component in BaF 2 crystals and enhanced the proportion of fast luminescent component in total absolute light yield 12–14 . One possible solution is to reduce the time decay of the long luminescence by doping BaF 2 with rare earth ions.…”

Section: Introductionmentioning

confidence: 97%

“…11 In the past few decades, the main researches focused on the suppression of slow luminescence component in BaF 2 crystals and enhanced the proportion of fast luminescent component in total absolute light yield. [12][13][14] One possible solution is to reduce the time decay of the long luminescence by doping BaF 2 with rare earth ions. In the rare-earth family, Ce 3+ , Pr 3+ , Eu 2+ , and Yb 3+ are well-known to researchers for the 5d-4f transition, which allowed by electric-dipole, and are very fast, with lifetimes of the order of dozens of nanoseconds.…”

Section: Introductionmentioning

confidence: 99%

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The effects of the solution reactant concentration and temperature on the preparation of Pr³⁺:BaF₂ transparent ceramics

Liu

Zhou

et al. 2021

J. Am. Ceram. Soc.

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Barium fluoride (BaF 2 ) crystals are attracting much attention as efficient inorganic scintillator promising for high-energy physics, industrial inspection, and other fields because of the fast component of the decay time (0.6 ns) and high radiation resistance. However, two major drawbacks limit its practical application: (i) a slow decay time of ~600 ns is derived from self-trapping excitons; (ii) the absolute light yield from the fast luminescence component is not competitive. The introducing of rare earth ions and preparation of BaF 2 polycrystalline ceramics is considered to be effective measures to solve these bottlenecks. Pr 3+ is extremely suitable as the activated ion of scintillation materials, which possess emission peaks located in visible band and the faster 5d-4f transition. In this work, highly sinterable Pr 3+ :BaF 2 precursor powder was synthesized via the coprecipitation method by adjusting the reactant concentration and temperature. The morphology and microstructure of as-synthesized powders were characterized using scanning electron microscopy (SEM) and transmittance electron microscopy analysis. The 5 at.% Pr 3+ :BaF 2 transparent ceramic with a transmittance of 50.7% at the wavelength of 500 nm was fabricated by hot pressing the as-prepared powders at 900°C for 4 h under the axial pressure of 50 MPa. The SEM images of ceramic cross-section show that the residual pore is the main light scattering source.The absorption and emission spectrum of ceramic samples were discussed.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

The effects of the solution reactant concentration and temperature on the preparation of Pr³⁺:BaF₂ transparent ceramics

Liu

Zhou

et al. 2021

J. Am. Ceram. Soc.

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“…The BaF 2 crystal is a promising scintillator for different applications, including detection of high energy gamma rays [1] and neutrons [2]. The scintillation material is also widely used in medicine for positron emission tomography (PET) [3]. The compound looks a promising detector to search for double beta (2β) decay of barium.…”

Section: Introductionmentioning

confidence: 99%

Investigation of rare nuclear decays with BaF2 crystal scintillator contaminated by radium

et al. 2014

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Abstract. The radioactive contamination of a BaF2 scintillation crystal with mass of 1.714 kg was measured over 101 hours in the low-background DAMA/R&D set-up deep underground (3600 m w.e.) at the Gran Sasso National Laboratories of INFN (LNGS, Italy). The half-life of 212 Po (present in the crystal scintillator due to contamination by radium) was measured as T 1/2 ( 212 Po) = 298.8±0.8(stat.)±1.4(syst.) ns by analysis of the events' pulse profiles. The 222 Rn nuclide is known as 100% decaying via emission of α particle with T 1/2 = 3.82 d; however, its β decay is also energetically allowed with Q β = 24 ± 21 keV. Search for decay chains of events with specific pulse shapes characteristic for α or for β/γ signals and with known energies and time differences allowed us to set, for the first time, the limit on the branching ratio of 222 Rn relatively to β decay as B β < 0.13% at 90% C.L. (equivalent to limit on partial half-life T

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“…The scintillation material is also widely used in medicine for positron emission tomography (PET) [3]. The compound looks a promising detector to search for double beta (2) decay of barium [4].…”

Section: Introductionmentioning

confidence: 99%

Radioactive contamination of BaF₂crystal scintillator

Belli

Bernabei

Cappella

et al. 2014

EPJ Web of Conferences

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Abstract. Barium fluoride (BaF 2 ) crystal scintillators are promising detectors to search for double beta decay processes in 130 Ba (Q 2 = 2619(3) keV) and 132 Ba (Q 2 = 844(1) keV). The 130 Ba isotope is of particular interest because of the indications on 2 decay found in two geochemical experiments. The radioactive contamination of BaF 2 scintillation crystal with mass of 1.714 kg was measured over 113.4 hours in a low-background DAMA/R&D set-up deep underground (3600 m w.e.) at the Gran Sasso National Laboratories of INFN (LNGS, Italy). The half-life of 212 Po (present in the crystal scintillator due to contamination by radium) was estimated as T 1/2 = 298.8 ± 0.8(stat.) ± 1.4(syst.) ns by analysis of the events pulse profiles.

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New fast scintillators on the base of BaF2 crystals with increased light yield of 0.9ns luminescence for TOF PET

Cited by 23 publications

References 9 publications

The effects of the solution reactant concentration and temperature on the preparation of Pr³⁺:BaF₂ transparent ceramics

The effects of the solution reactant concentration and temperature on the preparation of Pr³⁺:BaF₂ transparent ceramics

Investigation of rare nuclear decays with BaF2 crystal scintillator contaminated by radium

Radioactive contamination of BaF₂crystal scintillator

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New fast scintillators on the base of BaF2 crystals with increased light yield of 0.9ns luminescence for TOF PET

Cited by 23 publications

References 9 publications

The effects of the solution reactant concentration and temperature on the preparation of Pr3+:BaF2 transparent ceramics

The effects of the solution reactant concentration and temperature on the preparation of Pr3+:BaF2 transparent ceramics

Investigation of rare nuclear decays with BaF2 crystal scintillator contaminated by radium

Radioactive contamination of BaF2crystal scintillator

Contact Info

Product

Resources

About

The effects of the solution reactant concentration and temperature on the preparation of Pr³⁺:BaF₂ transparent ceramics

The effects of the solution reactant concentration and temperature on the preparation of Pr³⁺:BaF₂ transparent ceramics

Radioactive contamination of BaF₂crystal scintillator