Intrinsic and impurity cross-luminescence in three-component barium-containing compounds

Aleksandrov, Yu.M.; Kuusmann, I. L.; Makhov, V.N.; Mirov, Sergey; Uvarova, T. V.; Yakimenko, M.N.

doi:10.1016/0168-9002(91)90628-4

Cited by 17 publications

(3 citation statements)

References 5 publications

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“…AFL is the radiative recombination of the outermost core hole and a valence electron and is also called core-valence luminescence. AFL is observed in crystals such as BaF 2 , 9,10) CsF, 11) Rb 1−x Cs x CaCl 3 , 12,13) and BaY 2 F 8 , 14) which have bandgap energies larger than the energy gap between the valence band and the outermost core band. The required energy band structure presents a severe restriction for searching new AFL materials.…”

Section: Introductionmentioning

confidence: 99%

Luminescence characteristics of Cs₂BaCl₄

Takahashi

Arai

Koshimizu

et al. 2020

Jpn. J. Appl. Phys.

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Fast scintillation material based on the ternary halide crystal of Cs 2 BaCl 4 was synthesized. Under X-ray excitation, bands ascribed to STEs and AFL were observed. Cs 2 BaCl 4 had a low scintillation decay time constant of 1.2 ns, whose proportion was approximately 70% of the total scintillation amount. The light yield of Cs 2 BaCl 4 was estimated through measuring the gamma-ray-excited pulse height spectra. Cs 2 BaCl 4 had a total light yield of 2400 photons/MeV. Considering the proportion of the fast component was 70% of the total scintillation amount, the fast component light yield was approximately 1700 photons/MeV, which is larger than that of BaF 2 .

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Section: Introductionmentioning

confidence: 99%

Luminescence characteristics of Cs₂BaCl₄

Takahashi

Arai

Koshimizu

et al. 2020

Jpn. J. Appl. Phys.

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“…In addition to binary compounds, several ternary and more complex halide crystals have been reported to exhibit AFL, e.g. KMgF 3 , 12) BaY 2 F 8 , 18) CsCaCl 3 , 19,20) CsMgCl 3 , 21,22) and Cs 2 ZnCl 4 . [23][24][25] Of these materials exhibiting AFL, BaF 2 and CsF have been applied as scintillators, and BaF 2 is the most successful example of a fast scintillator for detection of high-energy photons.…”

Section: Introductionmentioning

confidence: 99%

Luminescence and scintillation properties of Cs₂ZnCl₄ and Cs₃ZnCl₅

Takahashi

Arai

Koshimizu

et al. 2020

Jpn. J. Appl. Phys.

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Fast scintillation materials based on the ternary halide crystals of Cs2ZnCl4 and Cs3ZnCl5 were synthesized. Under X-ray irradiation, an emission band at 310 nm with shoulders at 260 and 410 nm was observed for Cs2ZnCl4, and emission bands at 240, 290, and 390 nm were observed for Cs3ZnCl5. The observed bands were primarily attributable to Auger-free luminescence (AFL). In the temporal scintillation profiles, scintillation decay time constants of 1.7 and 1.1 ns were found for Cs2ZnCl4 and Cs3ZnCl5, respectively. These fast components are attributed to AFL and constituted greater than 88% of the total scintillation amount. On the basis of the pulse height spectra, the light yields of Cs2ZnCl4 and Cs3ZnCl5 were estimated to be 1280 and 440 photons MeV−1, respectively. The light yield of the fast component of Cs2ZnCl4 was slightly lower than that of BaF2, which is a commercially available fast scintillator exhibiting AFL.

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“…Ba 2+ ), then the radiative recombination of the valence electrons with holes created in the uppermost np levels of the impurity ion (5p levels of Ba 2+ ) can become possible. 9 Of course, such extrinsic CL is observed if the spectrum of these transitions is in the optical transmission region of the host crystal. The excitation threshold of the impurity CL coincides with the energy separation between the impurity np-level and the bottom of the conduction band.…”

Section: Introductionmentioning

confidence: 99%

Effect of local environment on crossluminescence kinetics in SrF2:Ba and CaF2:Ba solid solutions

Terekhin

Makhov

Лебедев

et al. 2015

Journal of Luminescence

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Spectral and kinetic properties of extrinsic crossluminescence (CL) in SrF 2 :Ba(1%) and CaF 2 :Ba(1%) are compared with those of intrinsic CL in BaF 2 and are analyzed taking into account EXAFS data obtained at the Ba L III edge and results of first-principles calculations. The CL decay time was revealed to be longer in SrF 2 :Ba and CaF 2 :Ba compared to BaF 2 . This fact contradicts the expected acceleration of luminescence decay which could result from an increased overlap of wave functions in solid solutions due to shortening of the Ba-F distance obtained in both EXAFS measurements and first-principles calculations. This discrepancy is explained by the effect of migration and subsequent non-radiative decay of the Ba (5p) core holes in BaF 2 and by decreasing of the probability of optical transitions between Ba (5p) states and the valence band in SrF 2 :Ba and CaF 2 :Ba predicted by first-principles calculations.

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Intrinsic and impurity cross-luminescence in three-component barium-containing compounds

Cited by 17 publications

References 5 publications

Luminescence characteristics of Cs₂BaCl₄

Luminescence characteristics of Cs₂BaCl₄

Luminescence and scintillation properties of Cs₂ZnCl₄ and Cs₃ZnCl₅

Effect of local environment on crossluminescence kinetics in SrF2:Ba and CaF2:Ba solid solutions

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Intrinsic and impurity cross-luminescence in three-component barium-containing compounds

Cited by 17 publications

References 5 publications

Luminescence characteristics of Cs2BaCl4

Luminescence characteristics of Cs2BaCl4

Luminescence and scintillation properties of Cs2ZnCl4 and Cs3ZnCl5

Effect of local environment on crossluminescence kinetics in SrF2:Ba and CaF2:Ba solid solutions

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Product

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Luminescence characteristics of Cs₂BaCl₄

Luminescence characteristics of Cs₂BaCl₄

Luminescence and scintillation properties of Cs₂ZnCl₄ and Cs₃ZnCl₅