GSI Darmstadt

GSI Helmholtzzentrum für Schwerionenforschung GmbH SHE Chemistry Planckstrasse 1 D-64291 Darmstadt Germany Room: SB3 3.163 Phone: +49 6159 71 2734 E-mail: K.Hermainski@gsi.de   ...

The TAN conferences, which were held for the first time in Seeheim near Darmstadt in 1999 (TAN 99), focus on the latest achievements and developments in the field of experiments and the theory of the chemistry and physics of transactinide elements. The scientific program includes experimental and theoretical aspects of the synthesis of superheavy elements, nuclear reactions, nuclear structure, chemistry, atomic properties and related topics. History of the TAN Conferences After the TAN 99 in Seeheim, further conferences in this series were organised every four years: Napa, USA (2003) Davos, Switzerland (2007) Sochi, Russia (2011) Urabandai, Japan (2015) Wilhelmshaven, Germany (2019) Huizhou, China (2023) ...

Experiments at the Limits of Stability: Exploring Physical and Chemical Properties of Superheavy Elements at TASCA Synthesis of the heaviest elements In the middle of the last century, extrapolations based on the nuclear shell model led to the prediction of the existence of heavy elements in a region of the nuclear chart far away from all nuclei that were known at the time. These elements, which exist only thanks to nuclear shell effects, were coined "superheavy elements" (SHE). The shell effects lead to stabilization against immediate spontaneous fission (SF); a macroscopic liquid drop fission barrier is no longer present. Beyond the closed spherical shells at Z=82 and N=126, which give rise to the doubly-magic stable Pb-208, theoretical calculations suggest the next shell closures at Z=114, 120, or 126, and N=172 or, more frequently, N=184. On the way to this long-sought "island of stability of superheavy elements", deformed shell closures have ...

GSI Helmholtzzentrum für Schwerionenforschung GmbH SHE Chemistry Planckstrasse 1 D-64291 Darmstadt Germany Room: SB3 3.163 Phone: +49 6159 71 2588 E-mail: J.Ballof@gsi.de ...

For the complete addresses of the associated institutions see "Contact" Dr. Jochen Ballof GSI Phone: +49 6159 71 2588 E-mail: J.Ballof@gsi.de More info Dr. Jadambaa Khuyagbaatar GSI Helmholtzzentrum für Schwerionenforschung GmbH GSI Helmholtzzentrum für Schwerionenforschung GmbH SHE Chemistry Planckstrasse 1 D-64291 Darmstadt Germany Room: SB3 3.183 Phone: +49 6159 71 2465 E-mail: j.khuyagbaatar@gsi.de More info Dr. Pavol Mosat GSI Phone: +49 6159 71 3188 E-mail: p.mosat@gsi.de More info Dr. Valeria Pershina GSI Phone: +49 6159 71 2461 E-mail: v.pershina@gsi.de Dr. Dennis Renisch Univ. Mainz Phone:  +49 6131 39 24507 E-mail:  renisch@uni-mainz.de More info PD Dr. Alexander Yakushev GSI Deputy Head of Department at GSI Phone: +49 6159 71 2460 E-mail: a.yakushev@gsi.de More info   ...

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GSI Helmholtzzentrum für Schwerionenforschung GmbH SHE Chemistry Planckstrasse 1 D-64291 Darmstadt Germany Room: SB3 3.183 Phone: +49 6159 71 3188 E-mail: P.Mosat@gsi.de ...

Long-living, excited nuclear states, so called isomers, have usually transition energies in the range of a few keV to MeV, so that they are not accessible for direct laser-induced excitation. One exception of this rule is the Th-229m isomer, predicted already in 1976, in order to explain measured γ-lines of the decay of the mother nuclide U-233. The excitation energy of this isomer was predicted to be in the range of only a few eV. The first experimental prove of its existence was achieved 2016 at LMU Munich, and in the meanwhile the value of the excitation energy could be pinned down to 8.28(17) eV Beside the pure physics interest to investigate this exotic isomer, a possible application in the future would be the usage as frequency generator in a so-called nuclear clock. A nuclear clock would be based on the same fundamental principle as atomic clocks, which are nowadays ...

Exotic Radioisotope Samples for Nuclear Science Experiments Exotic radioisotopes like those of the actinide elements are essential for various applications in the nuclear sciences. Our own most prominent use is that as target isotopes for the production of the superheavy elements (SHE) in heavy ion induced fusion reactions. Due to our expertise in purifying actinides, producing tailor-made samples and characterize these, we provide a multitude of samples to various international collaborations. The studying topics range from targets for laser and mass spectroscopic investigations, over myon-based experiments for the determination of nuclear charge radii to recoil sources where the daughter nuclides are to be used for atomic and nuclear physics or for chemical experiments. Our targets are also involved in a bunch of experiments related to the exotic low-energy isomer 229mTh, which has the capability to be used in the future in the construction of a "nuclear clock", as well as ...

The structure of the periodic table was conceived to reflect chemical similarities among elements within a given group. As new elements get discovered, they enter the periodic table based on their atomic number and accordingly find their place based on the number of protons in their nucleus, and hence the number of electrons in their atomic shell. Our group studies chemical properties of these new elements to elucidate if these resemble the known properties of their lighter homologs. All elements up to hassium (element 108) have been studied chemically and were shown to roughly conform to the structure of the periodic table as established by the lighter elements. Details of the measured behavior were often only understandable once special aspects of such heavy elements were taken into account – for example the influence of relativistic effects due to the high nuclear charge of superheavy nuclei. One current research focus is ...