Search results for "Heavy element"
showing 10 items of 67 documents
From nuclear halos to superheavy nuclei—Perspectives for nuclear structure research at GSI
1998
Of fundamental interest is the investigation of nuclear matter at the limits of its existence in the vicinity of the driplines and in the region of the superheavy elements. The availability of unstable nuclei over large energy ranges and new experimental developments gave new impulse to nuclear structure research. Examples are the investigations of halo nuclei by nuclear decay studies combined with reactions at low and high energies, the mapping of the mass surface in large-scale direct mass measurements, and the production of heavy and superheavy nuclei. New developments such as high-current accelerators or the next generation of radioactive beam facilities will lead to further progress in…
ATTEMPTS TO PRODUCE SUPERHEAVY ELEMENTS IN REACTIONS BETWEEN HEAVY NUCLEI
1978
Spectroscopic Tools Applied to Flerovium Decay Chains
2020
Abstract An upgraded TASISpec setup, with the addition of a veto DSSD and the new Compex detector-germanium array, has been employed with the gas-filled recoil separator TASCA at the GSI Helmholtzzentrum für Schwerionenforschung Darmstadt, to study flerovium (element 114) decay chains. The detector upgrades along with development of new analytical techniques have improved the sensitivity of the TASISpec setup for measuring α-photon coincidences. These improvements have been assessed with test reactions. The reaction 48Ca+206,207Pb was used for verification of experimental parameters such as transmission to implantation DSSD and target-segment to α-decay correlations. The reaction 48Ca+ nat …
Search for Superheavy Elements — A Status Report
1986
A survey is given of nuclear and chemical properties in the predicted island of spherical superheavy nuclei around element 114 and of recent attempts to produce such nuclei by transfer and fusion reactions.
Seaborgium's complex studies
2015
Christoph E. Dullmann reflects on the excitement, and implications, of probing the reactivity of heavy element seaborgium.
Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains
2014
Produced in the reaction 48Ca+243Am, thirty correlated α-decay chains were observed in an experiment conducted at the GSI Helmholzzentrum fur Schwerionenforschung, Darmstadt, Germany. The decay chains are basically consistent with previous findings and are considered to originate from isotopes of element 115 with mass numbers 287, 288, and 289. A set-up aiming specifically for high-resolution charged particle and photon coincidence spectroscopy was placed behind the gas-filled separator TASCA. For the first time, γ rays as well as X-ray candidates were observed in prompt coincidence with the α-decay chains of element 115.
Study of Superheavy Elements at the GSI-SHIP
2006
Super Heavy Elements - experimental developments
2018
With his theoretical work Walter Greiner, our mentor, pioneered super heavy element research and motivated us young scientists. He actively shaped the profile of GSI. We are happy that still during his lifetime we could prove some of his predictions: Fusion with magic nuclei paving the way to super heavy elements and the proof of the prediction of the nuclear species existing only by shell stabilization, super heavy elements. With the discovery of oganesson, Z=118, the heaviest element known today, we have come to the end of this era. New experimental developments will be discussed.
Walter Greiner, a Pioneer in Super Heavy Element Research Historical Remarks and New Experimental Developments
2020
With his theoretical work Walter Greiner pioneered super-heavy element research. He motivated the young scientists and actively shaped the profile of the Gesellschaft fur SchwerIonenforschung, GSI, Darmstadt. We are happy that still during his lifetime we at GSI could prove some of his predictions: Fusion with magic nuclei and super heavy elements, the nuclear species existing only by shell stabilization. With the discovery of oganesson, Z = 118, the heaviest element known today, we have come to the end of super heavy-element production by the fusion of magic nuclei. In-flight separation and new experimental developments including Walter Greiner’s new ideas for SHE synthesis will be discuss…
Exploiting transport properties for the detection of optical pumping in heavy ions
2020
We present a kinetic model for optical pumping in Lu$^+$ and Lr$^+$ ions as well as a theoretical approach to calculate the transport properties of Lu$^+$ in its ground $^1S_0$ and metastable $^3D_1$ states in helium background gas. Calculations of the initial ion state populations, the field and temperature dependence of the mobilities and diffusion coefficients, and the ion arrival time distributions demonstrate that the ground- and metastable-state ions can be collected and discriminated efficiently under realistic macroscopic conditions.