In-situ formation, thermal decomposition, and adsorption studies of transition metal carbonyl complexes with short-lived radioisotopes

Julia Even, Alexander Yakushev 3 , Christoph Emanuel Düllmann, Jan Dvorak 2 , Robert Eichler, Oliver Gothe 6 , Willy Hartmann 3 , Daniel Hild 1 , Egon Jäger 3 , Jadambaa Khuyagbaatar, Birgit Kindler 3 , Jens Volker Kratz 1 , Jörg Krier 3 , Bettina Lommel 3 , Lorenz Niewisch 1 , Heino Nitsche 6 , Inna Pysmenetska 1 , Matthias Schädel 3 , Brigitta Schausten 3 , Andreas Türler, Norbert Wiehl and David Wittwer
  • 1 Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
  • 2 Helmholtz-Institut Mainz, 55099 Mainz, Germany
  • 3 GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64192 Darmstadt, Germany
  • 4 Paul Scherrer Institut, 5232 Villigen, Switzerland
  • 5 University of Bern, 3012 Bern, Switzerland
  • 6 Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

Abstract

We report on the in-situ synthesis of metal carbonyl complexes with short-lived isotopes of transition metals. Complexes of molybdenum, technetium, ruthenium and rhodium were synthesized by thermalisation of products of neutron-induced fission of 249Cf in a carbon monoxide-nitrogen mixture. Complexes of tungsten, rhenium, osmium, and iridium were synthesized by thermalizing short-lived isotopes produced in 24Mg-induced fusion evaporation reactions in a carbon monoxide containing atmosphere. The chemical reactions took place at ambient temperature and pressure conditions. The complexes were rapidly transported in a gas stream to collection setups or gas phase chromatography devices. The physisorption of the complexes on Au and SiO2 surfaces was studied. We also studied the stability of some of the complexes, showing that these start to decompose at temperatures above 300 ℃ in contact with a quartz surface. Our studies lay a basis for the investigation of such complexes with transactinides.

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Radiochimica Acta publishes original papers, review articles, and “rapid communications” (short articles of a more timely interest) on all chemical aspects of nuclear science and technology. The journal is geared toward scientists who are actively engaged in research work.

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