Laser-induced fluorescence of uranyl complexes in aqueous solutions: the role of diffusion-controlled excited states annihilation

被引：6
作者：
Budylin, Gleb [1 ]
Shirshin, Evgeny [1 ]
Fadeev, Victor [1 ]
Petrov, Vladimir [2 ]
Kalmykov, Stepan [2 ]
机构：
[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia
[2] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia
来源：
OPTICS EXPRESS | 2013年 / 21卷 / 18期
关键词：
ELECTRONIC-STRUCTURE; ABSORPTION-SPECTRUM; ACTINYL IONS; LUMINESCENCE; SPECTROSCOPY; URANIUM(VI); SPECIATION; LIFETIME; WATER; FUEL;
D O I：
10.1364/OE.21.020517
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present the analysis of diffusion-controlled annihilation of excited U(VI) complexes in aqueous media that leads to appearance of rapid non-exponential fluorescence decay. We show that under typical experimental conditions the impact of annihilation processes can't be neglected when determining U(VI) complexes fluorescence lifetimes: at excitation intensities between 10(6) W/cm(2) and 10(8) W/cm(2), the rate of excited states deactivation increases, and then an opposite trend is observed. The latter can be interpreted as the consequence of optical breakdown in water. (C) 2013 Optical Society of America
引用
收藏
页码：20517 / 20528
页数：12
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