Wydział Chemii

Przemysław J. Dereń

Mirosław Karbowiak

J. C. Krupa

Janusz Drożdżyński

1998

Journal of Alloys and Compounds

275-277

393-397

10.1016/S0925-8388(98)00347-8

Naukowa

Angielski

Artykuł

A ZnCl₂-based glass sample doped with U³⁺ ions was prepared by mixing ZnCl₂, PbBr₂, KBr and UCl₃ in an appropriate stoichiometry and by melting the mixture at 450°C under vacuum. Absorption and luminescence spectra of the sample have been measured at 300 and 15 K, respectively. The absorption spectrum is typical for U³⁺ complex compounds in non-aqueous solutions. The emission bands observed at 14 250, 13 100, 8100, 7000 and 4170 cm⁻¹ have been assigned to the transitions from the lowest components of the ⁴F_9/2, ⁴G_7/2, ⁴I_13/2, ⁴F_3/2 and ⁴I_11/2 multiplets to the Stark components of the ⁴I_9/2 ground multiplet. Decay curves of the visible emission were strongly non-exponential. The decay time of the longest component of the decay profile was found to be equal to 7 μs and 800 ns at 10 and 300 K, respectively. Good agreement between the observed and calculated oscillator strengths has been obtained in an analysis of the f–f band intensities based on the Judd–Ofelt theory.

Uranium(III), Glass, Spectroscopy, Intensity analysis

https://doi.org/10.1016/S0925-8388(98)00347-8

http://www.elsevier.com