Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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S. Heinz<sup>1,2

1</sup>GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
²II. Physikalisches Institut, Justus-Liebig-Universität Gießen, Gießen, Germany

Abstract: The Separator for Heavy Ion Reaction Products (SHIP) is a velocity filter located at the UNILAC accelerator of GSI Darmstadt, Germany. For about 35 years a broad experimental program in the field of superheavy element research is running at SHIP. During the last years particularly investigations in the region of the heaviest known nuclei were performed. In fusion reactions of ⁴⁸Ca + ²⁴⁸Cm → ²⁹⁶116* a total of six decay chains was observed which could be attributed to the evaporation residues ²⁹²116 and ²⁹³116. In this experiment, data measured previously on the same isotopes in Dubna were well confirmed. Besides, two attempts were made to synthesize isotopes of the still unobserved element Z = 120 in reactions of ⁶⁴Ni + ²³⁸U and ⁵⁴Cr + ²⁴⁸Cm. No events were observed in these experiments leading to one-event cross-section limits of 90 and 560 fb, respectively. For future superheavy element research, a new superconducting continuous wave LINAC is planned at GSI which shall deliver beam intensities of up to 10¹⁴ particles per second. In this context we are developing a next generation separator and new detection techniques.

Keywords: fusion reaction, superheavy elements, Z = 116, Z = 120.

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