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Electromagnetic fission of238U at 600 and 1000 MeV per nucleon

  • Heavy Ion Physics
  • Published:
Zeitschrift für Physik A Hadrons and Nuclei

Abstract

Electromagnetic fission of238U projectiles at E/A =600 and 1000 MeV was studied with the ALADIN spectrometer at the heavy-ion synchrotron SIS. Seven different targets (Be, C, Al, Cu, In, Au and U) were used. By considering only those fission events where the two charges added up to 92, most of the nuclear interactions were excluded. The nuclear contributions to the measured fission cross sections were determined by extrapolating from beryllium to the heavier targets with the concept of factorization. The obtained cross sections for electromagnetic fission are well reproduced by extended Weizsäcker-Williams calculations which include E1 and E2 excitations. The asymmetry of the fission fragments' charge distribution gives evidence for the excitation of the double giant-dipole resonance in uranium.

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Author information

Author notes

  1. G. J. Kunde

    Present address: NSCL, MSU, 48824, East Lansing, MI, USA

  2. V. Lindenstruth

    Present address: LBL, 94720, Berkeley, CA, USA

Authors and Affiliations

  1. Gesellschaft für Schwerionenforschung, D-64220, Darmstadt, Germany

    Th. Rubehn, W. F. J. Müller, M. Begemann-Blaich, C. Groß, G. J. Kunde, W. D. Kunze, V. Lindenstruth, U. Lynen, B. Ocker, J. Pochodzalla, H. Sann, V. Serfling, W. Trautmann, A. Wörner & E. Zude

  2. Dipartimento di Fisica, Università di Milano I.N.F.N., I-20133, Milano, Italy

    R. Bassini, A. Ferrero & I. Iori

  3. Institut für Kernchemie, Universität Mainz, D-55099, Mainz, Germany

    Th. Blaich

  4. Dipartimento di Fisica dell' Università and I.N.F.N., I-95129, Catania, Italy

    G. Imme, G. Raciti, S. Reito & G. Verde

  5. Forschungszentrum Rossendorf, D-01314, Dresden, Germany

    T. Möhlenkamp & W. Seidel

  6. Lawrence Berkeley Laboratory, 94720, Berkeley, CA, USA

    L. G. Moretto

  7. Institut für Kernphysik, Universität Frankfurt, D-60486, Frankfurt, Germany

    A. Schüttauf

  8. Soltan Institute for Nuclear Studies, 00-681, Warsaw, Hoza 69, Poland

    A. Trzcinski & B. Zwieglinski

Authors
  1. Th. Rubehn
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  2. W. F. J. Müller
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Additional information

Communicated by V. Metag

This work forms part of the Ph.D. thesis of Th. Rubehn

The authors would like to thank T. Aumann and C. A. Bertulani for interesting and helpful discussions. J.P. and M.B. acknowledge the financial support of the Deutsche Forschungsgemeinschaft under the Contract No. Po256/2-1 and No. Bel634/1-1, respectively. This work was supported in part by the European Community under contract ERBCHGE-CT92-0003 and ERBCIPD-CT94-0091.

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Rubehn, T., Müller, W.F.J., Bassini, R. et al. Electromagnetic fission of238U at 600 and 1000 MeV per nucleon. Z. Physik A - Hadrons and Nuclei 353, 197–204 (1995). https://doi.org/10.1007/BF01295898

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