Optical properties of U4+-doped KPb2Cl5 single crystal

Abstract

A potassium lead(II) pentachloride (KPC) nonlinear single crystal doped with U 4? ions has been obtained by the Bridgman-Stockbarger method. Unpolarized absorption, excitation, and emission spectra of the crystal were recorded at room temperature in wide spectral ranges and are discussed. For the first time, the Judd-Ofelt intensity analysis of 5f 2 -5f 2 transitions in U 4? -doped single crystals has been performed. The experimental lifetimes for emitting levels in the visible spectral region are compared with those theoretically achieved by using the Judd-Ofelt approach.

Cs4UGe8O20: A Tetravalent Uranium Germanate Containing Four- and Five-Coordinate Germanium

“…All of these absorption values are in agreement with those of U 4+ in the literature . The photoluminescence spectrum of 1 (Figure b) consists of two broad bands centered at 511 and 534 nm, which correspond to the transition of 1 I 6 → 3 H 4 in the U 4+ ions …”

Uranium luminescence in La2Zr2O7: effect of concentration and annealing temperature

“…Uranium stabilized in the 3+ state has been reported in LaBr 3 , CsCdCl 3 , PbCl 2 and SrCl 2 . Similarly, the tetravalent state of the actinide has been reported in KPb 2 Cl 5 , Cs 2 GeF 6 and LiYF 4 . Uranium could be stabilized in the rare pentavalent state in CaO matrix .…”

Interplay of thermochemistry and Structural Chemistry, the journal (volume 21, 2010) and the discipline

“…The assignment has been proposed. In the following contribution [127], synthesis of U(IV)-doped KPb 2 Cl 5 single crystal and its unpolarized absorption, excitation, and emission spectra studied. Good agreement was found between theoretical lifetimes calculated by Judd-Ofelt intensity analysis of 5f 2 -5f 2 transitions calculated and experimentally measured for this compound.…”