GSI Darmstadt

Synthesis and Nuclear Structure of Heaviest Nuclei Uranium is the heaviest element that exists on earth in substantial quantities. Whereas natural trace quantities of neptunium and plutonium have been found as well, all heavier elements are only available via artificial production in nuclear reactions. Neutron-capture reactions leading to neutron-rich isotopes undergoing β--decay to the next heavier element allow forming elements up to fermium in this nuclear-reactor driven pathway, which allows producing macroscopic quantities. Yet heavier elements are produced in the fusion of two lighter nuclei, in heavy-ion induced reactions using projectile beams accelerated to about 10% of the speed of light. With increasing atomic number, the lifetimes of the artificial nuclei tend to decrease to the order of hours, minutes, seconds or even less the heavier the nuclei are. Soon after the nuclear shell model was conceived, the existence of vastly more long-lived nuclei in a region of superheavy nuclei, ...

PD Dr. Alexander Yakushev GSI Helmholtzzentrum für Schwerionenforschung GmbH Dept. SHE Chemistry Planckstrasse 1 64291 Darmstadt Germany Room: SB3 3.172 Phone: +49 6159 71 2460 E-mail: A.Yakushev@gsi.de     ...

of the (former) JGU Institute of Nuclear Chemistry 1999 - 2012 Complete annual reports of the years 1999 - 2012 Extracts (Nuclear Chemistry; pdf-files) Annual Report 2012 Annual Report 2011 Annual Report 2010 Annual Report 2009 Annual Report 2008 Annual Report 2007 Annual Report 2006 Annual Report 2005 Annual Report 2004 Annual Report 2003 Annual Report 2002 Annual Report 2001 Annual Report 2000 Annual Report 1999 ...

⇒ pdf-file Das Periodensystem der Elemente ist ein grundlegendes Ordnungsschema aller bekannten chemischen Elemente. Aktuell enthält es 118 Elemente. Das schwerste, Oganesson, wurde 2016 offiziell ins Periodensystem aufgenommen. Wissenschaftler erforschen seit Jahrzehnten, welches das schwerste Element ist, das existieren kann und haben auf dem Weg zu diesem Ziel eine Vielzahl neuer Elemente herstellen können. Das Rennen nach immer schwereren Elementen ist eine spannende wissenschaftliche Jagd – aktuell nach den Elementen 119 und 120. Daran angelehnt ist das Spiel „Die Jagd nach dem Element 119!“ entstanden. Dieses Spiel ist an das klassische Leiterspiel angelehnt und ist für 2-4 Spieler gedacht. Eine Datei zum selber ausdrucken findet sich hier oder per Mausklick auf das Bild unten; diese enthält auch die Spielanleitung. Wie im Leiterspiel, gibt es auch in der „Jagd nach 119“ Verbindungen von einem Elementkästchen (hier in rot) zu einem anderen (hier in blau). Nachstehend einige Hintergrundinformationen zu diesen Sprüngen, wobei ...

The extracted contributions from the individual annual reports are usually pdf-files GSI Annual Report 2023 (complete) SHE departments and HIM SHE section GSI Annual Report 2022 (complete) SHE departments and HIM SHE section GSI Annual Report 2021 (complete) SHE departments and HIM SHE section GSI Annual Report 2020 (complete) SHE departments and HIM SHE section GSI Annual Report 2019 (complete) SHE departments and HIM SHE section GSI Annual Report 2018 (complete) Departments SHE Chemistry and SHE Physics GSI Annual Report 2017 (complete) Activities in superheavy element research at SHIP and TASCA (H. David et al.) GSI Annual Report 2016 (complete) Contributions of the SHE Chemistry Group and contributions with participation of SHE Chemistry Group members GSI Annual Report 2015 (complete) Contributions of the SHE Chemistry Group and contributions with participation of SHE Chemistry Group members GSI Annual Report 2014 (complete) Contributions of the SHE Chemistry Group and contributions with participation ...

Exploring physical and chemical properties of the heaviest elements - the actinides and the transactinides. Elements beyond fermium are only available in atom-at-a-time quantities, produced in the nuclear reaction of an accelerated heavy ion with a suitable target. They are studied at GSI Darmstadt using the TransActinide Separator and Chemistry Apparatus TASCA, employing beams accelerated by the UNILAC accelerator. Our studies focus on the investigation and optimization of the production of heavy isotopes, on elucidating their nuclear structure, thus mapping the island of stability of superheavy elements, and on chemically characterizing the heaviest known elements in respect to their lighter homologs to study the evolution of the periodic table. Actinide elements up to fermium can be produced in macroscopic quantities in suitable high-flux research reactors. Samples of these elements are of interest in a variety of research programs in the basic sciences. Our group at Mainz University contributes to various ...

Cryo OnlineMultidetector for Physics And Chemistry of Transactinides Photo: G. Otto / GSI The Cryo OnlineMultidetector for Physics And Chemistry of Transactinides (COMPACT) is a gas chromatography setup suitable for investigations of the interaction strength of short-lived single radioactive species with different bulk materials. Its rectangular chromatography channel is formed by two arrays (32 cm long and 1 cm wide), comprising 32 PIN diodes suitable for registering α particles and fission fragments emitted from species that decay inside the channel. The surface of the silicon PIN diodes is covered by a thin layer of adsorbent material, e.g., SiO2 or Au. The array can be operated in an isothermal chromatography regime at a constant temperature (e.g., room temperature). Alternatively, a negative temperature gradient can be applied through a liquid nitrogen cryostat at the end of the channel (thermochromatography regime). A combination of several COMPACT detectors with different adsorbents and in a ...

TransActinide Separator and Chemistry Apparatus The highly efficient gas-filled TransActinide Separator and Chemistry Apparatus (TASCA) is a recoil separator optimized for the production and isolation of neutron-rich isotopes of elements around Z=112-120 in 48Ca and 50Ti induced hot-fusion reactions with actinide targets. TASCA is located at the GSI Helmholzzentrum für Schwerionenforschung, Darmstadt, Germany. Photo: G. Otto / GSI Target System A rotating target wheel with 100 mm diameter which comprises four individual target segments is installed at the TASCA target position. The wheel rotation is synchronized with the time structure of the pulsed UNILAC beam. All available target elements including highly radioactive transuranium isotopes can be irradiated. Recent experiments included 208Pb, 238U, 244Pu, 249Bk, and 249Cf targets. In long-term irradiations, beam intensities up to 1 mAparticle (DC) for beams with A~50 were routinely applied. In tests lasting a few hours, 40Ar intensities up to 2.5 µAparticle (DC), corresponding to 10 ...

More Info ... Collaborating Institutes Australia The Australian National University, Canberra Czech Republic Czech Technical University, Prague Finland University of Jyväskylä, Jyväskylä France Grand Accelerateur National d'Ions Lourds (GANIL), Caen CEA Saclay, Universite Paris-Saclay, Gif-sur-Yvette Germany GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt Helmholtz Institute Mainz (HIM), Mainz Hochschule Mannheim, Mannheim Johannes Gutenberg Universität Mainz, Mainz Department of Chemistry, Mainz Institute for Physics, Mainz India Indian Institute of Technology, Roorkee Japan Japan Atomic Energy Agency (JAEA), Advanced Science Research Center , Tokai RIKEN, Wako Norway University of Oslo, Oslo Sweden Lund University, Lund United Kingdom University of Liverpool, Liverpool USA Lawrence Livermore National Laboratory (LLNL), Livermore Oak Ridge National Laboratory (ORNL), Oak Ridge Texas A&M University, College Station University of Tennessee, Knoxville ...

(Partly in german) Arranged by Year Arranged by the Name of the Author The issues marked with * are available for viewing in the paper version at GSI in Darmstadt Arranged by Year 2024 Hermainski, Katharina: Single-atom gas chromatography studies on quartz glass to determine the volatility and reactivity of polonium Masterarbeit, Johannes Gutenberg-Universität Mainz, 2024 2023 Au, Mia: Production of actinide atomic and molecular ion beams at CERN-ISOLDE Dissertation, Johannes Gutenberg-Universität Mainz, April 2023 Fendel, Leonard Heinrich Maria: Laserablationsverhalten von Thorium(IV)iodid und Thorium(IV)nitrat Bachelorarbeit, Johannes Gutenberg-Universität Mainz, 2023 Stricker, Jonas: Flugzeitmessung von ablatierten Thorium-Ionen Masterarbeit, Johannes Gutenberg-Universität Mainz, 2023 2022 van de Laar, Jacques Joseph Wilhelmus: Installation and characterisation of a cylindrical measurement trap and mass measurements of transuranium elements at TRIGA-TRAP Dissertation, Johannes Gutenberg-Universität Mainz, April 2022 Götz, Stefan Alexander William: Characterization and modification of a buffer-gas-cell for rapid extraction of short-lived isotopes for use in gas-phase chemistry ...