Impurity absorption of rare-earth fluoride crystals in the vacuum ultraviolet region

Arkhangelskaya, V. A.; Reiterov, V. M.; Trofimova, L. M.

doi:10.1007/bf00611646

Cited by 15 publications

(9 citation statements)

References 7 publications

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“…1). It was reported that the Pb-doped CaF 2 crystals exhibited the 'A' band absorption ( 1 S 0 -3 P 1 ) at 6.05 eV [10]. To get more information, the OA spectra of unirradiated CaF 2 :Dy (TLD-200) and CaF 2 :Pb (0.1 wt%) crystals were shown, respectively, as curves b and c in Fig.…”

Section: Resultsmentioning

confidence: 98%

Photoluminescence studies of γ-irradiated CaF2:Dy:Pb:Na single crystals

Kennedy¹

2008

Journal of Luminescence

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Section: Resultsmentioning

confidence: 98%

Photoluminescence studies of γ-irradiated CaF2:Dy:Pb:Na single crystals

Kennedy¹

2008

Journal of Luminescence

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“…[13,14] it was shown that fluorite synthetic crystals demonstrate intensive enough optical absorption in 130-200 nm spectral range that is connected with presence of uncontrolled oxygen impurities which are falling into crystals from crucible and residual atmosphere at growing by means of Stokbarger technique. We assume that such oxygen centers (oxygen-vacancy defects and their aggregates) make appreciable contribution to the excitation of 4f n levels.…”

Section: Resultsmentioning

confidence: 99%

Excitation of inter- and intraconfigurational luminescence of trivalent rare earth ions in strontium fluoride crystals

Ivanovskikh¹,

Пустоваров²,

Smirnov³

et al. 2008

Journal of Alloys and Compounds

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Excitation spectra for intraconfigurational (4f n → 4f n ) and interconfigurational (4f n−1 5d → 4f n ) radiative transitions of trivalent rare earth ions (Sm 3+ , Tb 3+ , Er 3+ , and Tm 3+ ) doped into SrF 2 crystals have been studied using VUV synchrotron radiation and analyzed. The distinctions and peculiarities of excitation mechanisms for 4f n or 4f n−1 5d emitting levels are discussed.

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“…Three optical absorption (OA) bands, all in the VUV region, are assigned to this defect. Characteristics of the bands peaking at 6.7 and 8.4 eV are firmly established, 29,30 while exact position and the width of the third, higher energy, band are still debated. Authors of Ref.…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of oxygen centers in CaF2crystals fromab initioembedded cluster calculations

et al. 2011

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We present the results of ab initio calculations of several intrinsic and oxygen-containing defects in CaF 2 including an F center, a substitutional O − ion, an O 2−-vacancy dipole, and F A (O 2−) and F + 2A (O 2−) centers. The calculations have been performed using a hybrid density functional and an embedded cluster method. The calculated optical absorption (OA) spectra and magnetic properties are in a very good agreement with available experimental data. It is suggested that isolated substitutional O − ions induce an OA band in the vacuum ultraviolet region at about 7 eV. The nature of the OA bands associated with O 2−-vacancy dipoles and other, more complex, defects is clarified and corresponding luminescence mechanisms are discussed.

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Impurity absorption of rare-earth fluoride crystals in the vacuum ultraviolet region

Cited by 15 publications

References 7 publications

Photoluminescence studies of γ-irradiated CaF2:Dy:Pb:Na single crystals

Photoluminescence studies of γ-irradiated CaF2:Dy:Pb:Na single crystals

Excitation of inter- and intraconfigurational luminescence of trivalent rare earth ions in strontium fluoride crystals

Structure and properties of oxygen centers in CaF2crystals fromab initioembedded cluster calculations

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