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1

Analysis of 5f^{3} → 5f^{2}6d^{1} Transitions in the Absorption Spectrum of U^{3+} in Cs_{2}NaYCl_{6}

100%

Drożdżyński J.

Acta Physica Polonica A

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1993

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vol. 84

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issue 5

975-977

EN

The electronic absorption spectrum of a Cs_{2}NaYCl_{6} :U^{3+} single crystal was investigated in the 13000-45000 cm^{-1} spectral range at 300 K. An interpretation of the 5f^{3} → 5f^{2}6d^{1} transitions on the basis of the J_{iγ} interaction enabled the determination of the energy of the first unresolved level of the 5f^{2}6d^{1} electronic configuration, the distance between the first two levels of the configuration as well as the splitting parameter of the d-electron in the crystal field.

2

Analysis of Emission and Vibronic Transitions in Uranium(3+) Doped Cs_{2}LiYCl_{6} Single Crystals

51%

Karbowiak M., Simoni E., Drożdżyński J., Hubert S.

Acta Physica Polonica A

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1996

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vol. 90

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issue 2

367-370

EN

Uranium(3+) doped single crystals of Cs_{2}LiYCl_{6} with a 0.3 and 2.0% U^{3+} concentration have been obtained by the Bridgman-Stockbarger method. Luminescence spectra of the crystals were recorded at 27 and 15 K, respectively. The emission bands observed in the visible and near infrared regions have been assigned to transitions from the ^{4}I_{11/2}, ^{4}F_{3/2}, and ^{4}G_{7/2} levels to the ^{4}I_{9/2} ground level.

3

Luminescence and Excitation Spectra of U^{3+} doped RbY_{2}Cl_{7} Single Crystals

45%

Karbowiak M., Murdoch K., Drożdżyński J., Edelstein N., Hubert S.

Acta Physica Polonica A

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1996

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vol. 90

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issue 2

371-376

EN

Uranium(3+) doped single crystals of RbY_{2}Cl_{7} with a uranium concentration of 0.05% and 0.2% were grown by the Bridgman-Stockbarger method using RbU_{2}Cl_{7} as the doping substance. Polished plates of ca. 5 mm in diameter were used for measurements of luminescence and excitation spectra. Since the U^{3+} ions occupy two somewhat different site symmetries, a splitting of all observed f-f bands was observed. The analysis of the spectra enabled definitively an assignment of 22 crystal field bands for both site symmetries as well as the total crystal field splitting of the ground level, equal to 473 cm^{-1} and 567 cm^{-1} for the first and second site symmetry, respectively.

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3 Acta Physica Polonica A

2 1996

1 1993

3 Drożdżyński J.

2 Hubert S.

2 Karbowiak M.

1 Edelstein N.

1 Murdoch K.

1 Simoni E.

Analysis of 5f^{3} → 5f^{2}6d^{1} Transitions in the Absorption Spectrum of U^{3+} in Cs_{2}NaYCl_{6}

Analysis of Emission and Vibronic Transitions in Uranium(3+) Doped Cs_{2}LiYCl_{6} Single Crystals

Luminescence and Excitation Spectra of U^{3+} doped RbY_{2}Cl_{7} Single Crystals