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Fission fragment distribution following antiproton absorption at rest on238U

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Zeitschrift für Physik A Hadrons and Nuclei

Abstract

The distribution of nuclei resulting from the annihilation of stopped antiprotons on238U has been studied by an off-line measurement of the residual radioactivity. It was found that the probability of fission exceeds 84% (68% c.l.). The charge and mass distributions of the fission products can be separated into two parts, a more frequent symmetric component originating from high energy fission (excitation energy between 100 MeV and 1 GeV) and an asymmetric component from low energy fission (excitation energy less than 40 MeV).

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Author notes

  1. Sa Jun

    Present address: Institute of Atomic Energy, Beijing, People's Republic of China

  2. H. S. Plendl

    Present address: Florida State University, 32306, Tallahassee, FL, USA

Authors and Affiliations

  1. Institut für Kernphysik, Forschungszentrum Jülich, Postfach 1913, W-5170, Jülich, Federal Republic of Germany

    H. Machner, Sa Jun, G. Riepe & D. Protic

  2. Physik-Department, Technische Universität München, James-Franck-Strasse, W-8046, Garching, Federal Republic of Germany

    H. Daniel, T. von Egidy, F. J. Hartmann, W. Kanert, W. Markiel & H. S. Plendl

  3. University of Virginia, 22901, Charlottesville, VA, USA

    K. Ziock & R. Marshall

  4. University of Mississippi, 38677, University, MI, USA

    J. J. Reidy

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  1. H. Machner
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Additional information

Dedicated to Prof. Dr. P. Armbruster on the occasion of his 60th birthday

We wish to thank L. Simons for supplying a Ge detector, P. Hofmann and Y.S. Kim for fruitful discussions, and the LEAR crew for providing very good experimental conditions. One of us (H.S.P.) acknowledges the receipt of a NATO (Division of scientific affairs) grant. This work was supported in part by the Bundesministerium für Forschung und Technologie and by the US Dept. of Energy.

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Machner, H., Jun, S., Riepe, G. et al. Fission fragment distribution following antiproton absorption at rest on238U. Z. Physik A - Hadrons and Nuclei 343, 73–77 (1992). https://doi.org/10.1007/BF01291600

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  • DOI: https://doi.org/10.1007/BF01291600

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