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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Ed. by Qaim, Syed M.


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Chemical studies on rutherfordium (Rf) at JAERI

Yuichi Nagame / K. Tsukada / M. Asai / A. Toyoshima / K. Akiyama / Y. Ishii / T. Kaneko-Sato / M. Hirata / I. Nishinaka / S. Ichikawa / H. Haba / Shuichi Enomoto

Citation Information: Radiochimica Acta. Volume 93, Issue 9-10/2005, Pages 519–526, ISSN (Print) 0033-8230, DOI: 10.1524/ract.2005.93.9-10.519, December 2007

Publication History

Received:
February 10, 2005
Accepted:
June 6, 2005
Published Online:
2007-12-21

Summary

Chemical studies on element 104, rutherfordium (Rf), at JAERI (Japan Atomic Energy Research Institute) are reviewed. The transactinide nuclide 261Rf has been produced in the reaction 248Cm(18O, 5n) at the JAERI tandem accelerator with the production cross section of about 13 nb. On-line anion-exchange experiments on Rf together with the lighter homologues, group-4 elements Zr and Hf, in acidic solutions have been conducted with a rapid ion-exchange separation apparatus. From the systematic study of the anion-exchange behavior of Rf, it has been found that the properties of Rf in HCl and HNO3 solutions are quite similar to those of Zr and Hf, definitely confirming that Rf is a member of the group-4 elements. However, we have observed an unexpected chemical behavior of Rf in HF solutions; the fluoride complex formation of Rf is significantly different from those of the homologues. Prospects of extending chemical studies on transactinide elements in the near future at JAERI are briefly considered.

Keywords: Rutherfordium; Production of 261Rf; Atom-at-a-time chemistry; Anion-exchange behavior; Elution curve; Distribution coefficient Kd

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