First Observation of the Cation-Cation Interaction of Actinides in Melts: NpO2+-UO22+ System

被引：0
|
作者：
Yu. A. Barbanel'
R. B. Dushin
V. V. Kolin
V. P. Kotlin
L. G. Mashirov
S. N. Nekhoroshkov
机构：
[1] Research and Production Association,Khlopin Radium Institute
来源：
Radiochemistry | 2003年 / 45卷 / 3期
关键词：
Physical Chemistry; Inorganic Chemistry; Absorption Spectrum; Intensity Ratio; Sharp Peak;
D O I：
10.1023/A:1026016310678
中图分类号：
学科分类号：
摘要：
Study of the absorption spectra of the NpO2+ ion in a CsCl melt containing 2 M UO22+, as well as in K2UO2Cl4 and Cs2UO2Cl4 melts (T = 700°C), allowed the first detection of the cation-cation interaction of actinides in melts. In all the molten salts studied, the cation-cation interaction of NpO2+ and UO22+ is manifested most clearly (via appearance of an additional band) in the 3H5 ← 3H4 magnetic-dipole transition of the 5f2 configuration of the NpO2+ ion (D4h symmetry) near 1.6 μm: Along with a sharp peak of unbound neptunyl(V) at ∼1660 nm, there is an equally sharp peak at 1633 nm belonging to the cation-cation complex. The intensity ratio for the peaks at 1633 and 1660 nm increases in the series of melts (UO22+ in CsCl) < K2UO2Cl4 < Cs2UO2Cl4 by two orders of magnitude.
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页码：276 / 278
页数：2
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