Photo- and Radioluminescence Properties of Ce3+-doped Lu3Al5O12 Thick Film Grown by Chemical Vapor Deposition

We prepared 25Li 2 O-10MgO-65SiO 2 glasses doped with various concentrations of Ce by the melt-quenching method and systematically evaluated their photoluminescence (PL) and dosimetric properties. X-ray diffraction patterns showed that the prepared samples were in an amorphous state. The PL spectra and decay curves of the Ce-doped glasses confirmed the PL emission peak due to the 5d-4f transitions of Ce 3+ ions. The PL quantum yields of the 0.3, 1, 3, 5, and 10% Ce-doped glasses were 17.5, 31.0, 36.6, 27.2, and 26.3%, respectively. Regarding dosimetric properties, the Ce-doped glasses showed thermally stimulated luminescence (TSL) at 100, 300, and 400 °C. Moreover, the 1, 3, 5, and 10% Ce-doped glasses showed the TSL dose response from 10 mGy to 10 Gy with a proportional relationship.

Section: Resultsmentioning

confidence: 99%

Dosimetric Properties of Ce-doped 25Li2O–10MgO–65SiO2 Glasses

Ichiba¹,

Takebuchi²,

Kimura³

et al. 2022

“…(8) Since the performance of scintillation detectors mainly depends on the scintillation properties and chemical composition of scintillators, the scintillation properties of many materials have been investigated. (9)(10)(11)(12)(13)(14)(15)(16)(17)(18) The required properties of scintillators for X-and γ-ray detection are a large effective atomic number (Z eff ), a short decay time, a high light yield, and a low spatial resolution. (19) To date, the material forms of commercial scintillators for X-and γ-ray detection have used mainly single crystals because of their high density and optical qualities.…”

Section: Introductionmentioning

confidence: 99%

Optical and Scintillation Properties of Eu-doped CsBr–BaBr2–ZnBr2 Glasses

Kimura¹,

Kato²,

Nakauchi³

et al. 2022

20CsBr-20BaBr 2 -60ZnBr 2 glasses doped with various concentrations of Eu (0.01, 0.05, 0.1, and 0.5%) were synthesized by the melt-quenching method, and their optical and scintillation properties were investigated. In the photoluminescence (PL) and X-ray-induced scintillation spectra of all the prepared glasses, the emission band around 415 nm due to the 5d-4f transitions of Eu 2+ was observed. In the scintillation spectrum, the 0.5% Eu-doped glass showed sharp emission peaks at 590 and 610 nm, which have a typical spectral shape for the 4f-4f transitions of Eu 3+ . Under 241 Am α-ray irradiation, the light yields of 0.01 and 0.05% Eu-doped glasses were 75 and 100 ph/5.5 MeV-α, respectively.

“…Owing to its success in medical applications, the Ce 3+ ion has become a wellknown emission center in the field of developing scintillator materials. (8)(9)(10)(11)(12)(13)(14)(15)(16)(17) Some researchers are currently focusing on Ce-concentrated ternary chloride scintillators because of the large atomic number of Ce (Z = 58), as well as their high light yields and short decay times due to the 5d-4f allowed transitions of Ce 3+ . (18)(19)(20)(21) Meanwhile, most common scintillators activated by extrinsic dopants tend to have an inhomogeneous dopant distribution in the crystal.…”

Section: Introductionmentioning

confidence: 99%

New Intrinsic Fast Scintillator: Cesium Praseodymium Chloride

Fujimoto¹,

Nakauchi²,

Yanagida³

et al. 2022

A sample of Cs 3 PrCl 6 crystal was grown under vacuum using the vertical Bridgman-Stockbarger method. The excitation spectrum, monitored at an emission wavelength of 310 nm, showed at least two excitation bands at around 233 and 257 nm. These excitation bands corresponded to the transitions from 4f 2 ground states ( 3 H J and 3 F J ) to 5d excited states of Pr 3+ split by the ligand-field interaction and the spin-orbit coupling. Upon UV excitation at 233 nm, the characteristic Pr 3+ 4f 1 5d 1 →4f 2 emission bands were observed at 285 and 312 nm. The scintillation spectrum shows two emission bands peaking at 285 and 312 nm, which is consistent with the photoluminescence, and can thus be assigned to the transitions between the 5d 1 excited state and 4f 2 ground states owing to the Pr 3+ . The fast scintillation decay time constants were estimated to be approximately 11.7 ns (53%) and 72 ns (47%). The scintillation light yield reached 5900 ph/MeV.