Isotope effects in Eu(II)/Eu(III) electron exchange system observed by using cation exchange chromatography

被引：13

作者：

Ismail, I ^{[1
]}

Nomura, M ^{[1
]}

Fujii, Y ^{[1
]}

机构：

[1] Tokyo Inst Technol, Nucl Reactors Res Lab, Meguro Ku, Tokyo 1528550, Japan

来源：

JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY | 1998年 / 35卷 / 11期

关键词：

europium; isotope separation; ion exchange; cation exchange resin; chromatography; isotope effects; separation coefficients; equilibrium constant; HETP; electron exchange; temperature dependence;

D O I：

10.3327/jnst.35.801

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Europium isotope effects in the Eu(II)/ Eu(III) electron exchange system (EXS) has been studied by means of cation exchange chromatography in the temperature range 308-343K. The heavier isotope (EU)-E-153 was enriched at the front part of the europium band, and the values of the observed single stage separation coefficients (epsilon=alpha-1), Of the Eu-153/Eu-151 isotopic pair, increased with the increase in temperature as 1.1x10(-4) 1.2x10(-4), 2.1x10(-4), and 2.4x10(-4) at 308 K, 323 K, 333 K, and 343 K, respectively. Based on the experimental data, the logarithm of the isotopic equilibrium constant, ln K=epsilon(0), of Eu(II)/Eu(III) electron exchange system have been calculated. The chromatographic height equivalent to a theoretical plate, HETP, was also calculated and found to decrease with temperature.

引用

页码：801 / 807

页数：7

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