SISAK Liquid-Liquid Extraction Experiments with Preseparated 257Rf

Jon Petter Omtvedt; J. Alstad; H. Breivik; J. E. Dyve; K. Eberhardt; C. M. FoldenIII; T. Ginter; K. E. Gregorich; E. A. Hult; M. Johansson; U. W. Kirbach; D. M. Lee; M. Mendel; A. Nähler; V. Ninov; L. A. Omtvedt; J. B. Patin; G. Skarnemark; L. Stavsetra; R. Sudowe; N. Wiehl; B. Wierczinski; P. A. Wilk; P. M. Zielinski; J. V. Kratz; N. Trautmann; H. Nitsche; D. C. Hoffman

doi:10.14494/jnrs2000.3.121

SISAK Liquid-Liquid Extraction Experiments with Preseparated ²⁵⁷Rf

Jon Petter Omtvedt, J. Alstad, H. Breivik, J. E. Dyve, K. Eberhardt, C. M. FoldenIII, T. Ginter, K. E. Gregorich, E. A. Hult, M. Johansson, U. W. Kirbach, D. M. Lee, M. Mendel, A. Nähler, V. Ninov, L. A. Omtvedt, J. B. Patin, G. Skarnemark, L. Stavsetra, R. Sudowe, N. Wiehl, B. Wierczinski, P. A. Wilk, P. M. Zielinski, J. V. Kratz, N. Trautmann, H. Nitsche, D. C. Hoffman

Author information

Jon Petter Omtvedt
Department of Chemistry, University of Oslo
J. Alstad
Department of Chemistry, University of Oslo
H. Breivik
Department of Chemistry, University of Oslo
J. E. Dyve
Department of Chemistry, University of Oslo
K. Eberhardt
Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, Germany
C. M. FoldenIII
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Department of Chemistry, University of California, Berkeley, CA, USA
T. Ginter
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
K. E. Gregorich
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
E. A. Hult
Department of Chemistry, University of Oslo
M. Johansson
Department of Chemistry, University of Oslo
U. W. Kirbach
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
D. M. Lee
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
M. Mendel
Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, Germany
A. Nähler
Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, Germany
V. Ninov
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
L. A. Omtvedt
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
J. B. Patin
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Department of Chemistry, University of California, Berkeley, CA, USA
G. Skarnemark
Department of Nuclear Chemistry, Chalmers University of Technology, Göteborg, Sweden
L. Stavsetra
Department of Chemistry, University of Oslo
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
R. Sudowe
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
N. Wiehl
Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, Germany
B. Wierczinski
Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, Germany
P. A. Wilk
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Department of Chemistry, University of California, Berkeley, CA, USA
P. M. Zielinski
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Department of Chemistry, University of California, Berkeley, CA, USA
Glenn T. Seaborg Center, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
J. V. Kratz
Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, Germany
N. Trautmann
Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, Germany
H. Nitsche
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Glenn T. Seaborg Center, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
D. C. Hoffman
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Department of Chemistry, University of California, Berkeley, CA, USA

JOURNAL FREE ACCESS

2002 Volume 3 Issue 1 Pages 121-124

DOI https://doi.org/10.14494/jnrs2000.3.121

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Abstract

The SISAK liquid-liquid extraction system was used to extract 4.0-s ²⁵⁷Rf. The ²⁵⁷Rf was produced in the reaction ²⁰⁸Pb (⁵⁰Ti, 1n) ²⁵⁷Rf with 237-MeV beam energy on target, separated in the Berkeley Gas-filled Separator (BGS) and transferred to a gas jet using the Recoil Transfer Chamber (RTC). The activity delivered by the gas jet was dissolved in 6-M HNO₃ and Rf was extracted into 0.25-M dibutyl-phosphoric acid in toluene. This was the first time a transactinide, i. e., an element with Z≥104, was extracted and unequivocally identified by the SISAK system. Thus, this pilot experiment demonstrates that the fast liquid-liquid extraction system SISAK, in combination with liquid-scintillation detectors, can be used for investigating the chemical properties of the transactinides. The extraction result is in accordance with the behaviour shown by the Rf group IV homologues Zr and Hf.

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