Nuclear field shift effect in the isotope exchange reaction of cadmium using a crown ether

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• 作者：Toshiyuki Fujii ; Fré ; dé ; ric Moynier ; Philippe Telouk ; Francis Albarè ; de
• 关键词：Cadmium ; Isotope fractionation ; Mass-independent ; Nuclear field shift ; Crown ether ; Solvent extraction
• 刊名：Chemical Geology
• 出版年：2009
• 出版时间：30 September 2009
• 年：2009
• 卷：267
• 期：3-4
• 页码：157-163
• 全文大小：705 K

文摘

Cadmium isotopes were fractionated by the liquid–liquid extraction technique with a crown ether, dicyclohexano-18-crown-6. The isotopic ratios of ^mCd/¹¹¹Cd (m: 110, 112, 113, 114, and 116) were measured precisely by the multi-collector inductively coupled plasma spectrometry (MC-ICP-MS). When the isotope enrichment factors were calculated, the odd atomic mass isotopes (¹¹¹Cd and ¹¹³Cd) showed excesses of enrichment comparing to the even atomic mass isotopes (¹¹⁰Cd, ¹¹²Cd, ¹¹⁴Cd and ¹¹⁶Cd). This odd–even staggering property originates from the nuclear field shift effect. The contribution of the nuclear field shift effect to the observed isotope enrichment factor was estimated to be 5 to 30 % .