Thursday, December 1, 2016, 16:00
WHGA Auditorium
Robert Eichler, PSI
Abstract: More than 40 new isotopes of Superheavy Elements (SHE, Z>103) have been discovered in the last 15 years at the Flerov Laboratory for Nuclear Reactions, Dubna, Russia in 48Ca induced nuclear fusion reactions with actinides. Elements with atomic numbers 113 -118 were recently given their names. These discovery experiments observed isotopes of transactinides from rutherfordium (Z=104) - flerovium (Z=114) with half-lives between seconds and several hours. Thus, a broad experimental playground opened up for their experimental investigations. Some of these experiments shall assess chemical properties of super heavy elements (SHE) and reveal the influence of relativistic effects in their electron structure, thus, probing the validity of laws established by the periodic table at its very edge. This talk introduces some basic principles of the applied gas phase chemical methods and summarizes results obtained in investigations with transactinides: A: Results from gas phase chemical investigations of elements Cn and Fl obtained within the PSI-University of Bern-FLNR-LLNL-ITE Collaboration* will be presented. B: The recent observation of in-situ transition metal carbonyl compound formation for recoiling fission products and evaporation residues from nuclear fusion reactions behind physical separators allowed for assessing organometallic gas phase complexes of transactinides and probing for the first time the bond strength within a transactinide molecule. First results obtained by the Carbonyl Collaboration** will be presented.
*PSI-University of Bern-FLNR-LLNL Collaboration: F.Sh. Abdullin (3), N.V. Aksenov (3), Yu.V. Albin (3), A.V. Belozerov (3), G.A. Bozhikov (3), V.I. Chepigin (3), N.M. Chiera (1,2), R. Dressler (1), S.N. Dmitriev (3), R. Eichler (1,2), H.W. Gäggeler (1,2), V.A. Gorshkov (3), R.A. Henderson (4), D. Herrmann (1), M.G. Itkis (3), A.M. Johnsen (4), J.M.Kenneally (4), B. Kraus (1,2),V.Ya. Lebedev (3), Yu.V. Lobanov (3), O.N. Malyshev (3), K.J. Moody (4), Yu.Ts. Oganessian (3), O.V. Petrushkin (3), A.N. Polyakov (3), D. Piguet (1), A.G. Popeko (3), P. Rasmussen (1), R.N. Sagaidak (3), A. Serov (1,2), I.V. Shirokovsky (3), D.A. Shaughnessy (4), S.V. Shishkin (3), A.M. Sukhov (3), A.V. Shutov (3), P. Steinegger (1,2),M.A. Stoyer (4), N. J. Stoyer (4), A.I. Svirikhin (3), E.E. Tereshatov (3), Yu.S. Tsyganov (3), A. Türler (1,2), V.K. Utyonkov (3), A. Voegele (1), G.K. Vostokin (3), I. Usoltsev (1,2), M. Wegrzecki (5), D. Wittwer (2), Y. Wittwer (2), P.A. Wilk (4) , A.V. Yeremin (3)
1 Labor für Radiochemie, Paul Scherrer Institut, CH-5232 Villigen,
Switzerland.
2 Departement für Chemie und Biochemie, Universität Bern,
CH-3012 Bern, Switzerland.
3 Flerov Laboratory of Nuclear Reactions,
Joint Institute for Nuclear Research, 141980 Dubna, Russia.
4 Lawrence
Livermore National Laboratory, University of California, 94551
Livermore, USA.
5 Insitute of Electron Technology, 02-668 Warsaw, Poland.
**Carbonyl Collaboration: M. Asai (3), H. Brand (4), N.M. Chiera (1,2), A. Di Nitto (4,5), R. Dressler (1), Ch.E. Düllmann (4,5,6), R. Eichler (1,2), J. Even (4,6), F. Fangli (7), M. Goetz (4,5,6), H. Haba (8), W. Hartmann (4), D. Herrmann (1), E. Jäger (4), D. Kaji (8), J. Kanaya (8), Y. Kaneya (3), J. Khuyagbaatar (4,6), B. Kindler (4), Y. Komori (8), B. Kraus (1,2), J.V. Kratz (5), J.Krier (4), Y. Kudou (8), N. Kurz (4), S. Miyashita (3,9), K. Morimoto (8), K. Morita (8,10), M. Murakami (8,11), Y. Nagame (3), K. Ooe (11), D. Piguet (1), N. Sato (8), T.K. Sato (3), J. Steiner (4), P. Steinegger (1,2), T. Sumita (8), M. Takeyama (8), K. Tanaka (8), T. Tomitsuka (11), A. Toyoshima (3), K. Tsukada (3), A. Türler (1,2), I. Usoltsev (1,2), Y. Wakabayashi (8), Y. Wang (7), N. Wiehl (5,6), Y. Wittwer (1,2), A. Yakushev (4,6), S. Yamaki (8), S. Yano (8), S. Yamaki (8), Z. Qin (7)
1 Labor für Radiochemie, Paul Scherrer Institut, CH-5232 Villigen,
Switzerland.
2 Departement für Chemie und Biochemie,
Universität Bern,
CH-3012 Bern, Switzerland.
3 Advanced Science Research Center, Japan
Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan.
4 GSI
Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt,
Germany.
5 Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany.
6 Helmholtz-Institut Mainz, 55099 Mainz, Germany.
7 Institute of Modern
Physics Lanzhou; Chinese Academy of Sciences, 730000 Lanzhou, China.
8 Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama
351-0198, Japan.
9 Hiroshima University, Kagamiyama, Higashi-Hiroshima
739-8526, Japan.
10 Kyushu University, Higashi-Ku, Fukuoka, 812-8581,
Japan.
11 Niigata University, Niigata, Niigata 950-2181, Japan.