Interaction of excited states in uranyl salts

Steady-state and time-dependent luminescence of UO2MoO4

“…1) [3] for 3.33 io~2~. Other estimates [7,8]are in the order of io_8_ 1o~s.Roughly, i~and Ttj seem to be of the same order of magnitude indicating an energy transfer proces intermediate between trap-limited migration and diffusion-limited migration.…”

Parametric Investigation of Laser-Induced Fluorescence of Solid-State Uranyl Compounds

“…If the sample was exposed to the laser beam for extended periods of time, the yellow uranyl compounds were observed to turn gray or black where the Nd:YAG laser beam (approximately 1 cm diameter) irradiated the sample. The cause of the color change is probably due to photochemical reduction of U(VI) to U(V) and U(IV) ,,− or in the language of solid state physics, to the formation of color centers. ,− The data in Figure were fit using linear regression in Microsoft EXCEL spreadsheets; the slopes of the resulting linear fits are presented in Table . As Figure shows and Table documents, the rate of emission intensity increase is different for different uranyl emission bands, specifically the rate of emission intensity increases with increasing laser power and decreases in the order 509 nm > 533 nm > 488 nm ∼560 nm > 587 nm.…”

Steady-state and time-dependent luminescence of UO2MoO4

“…1) [3] for 3.33 io~2~. Other estimates [7,8] Schematic energy level diagram for invs. I and I vs. T curves for traps 5 trinsic centres and traps 5 and 6.…”