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Neutrons produced by 1.22 GeV antiproton interactions with nuclei

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Abstract

Inclusive neutron energy spectra were measuredb y time of flight using 1.22 GeV antiprotons from LEAR, CERN, as projectiles andtargets from natural Al, Cu, Ag, Ho, Ta, Au, Pb, Bi, U. The sum of two Maxwellian distributions was fitted to the spectra d2 σ/(dΩdE) obtainedat several forward andbac kwardangles yielding neutron multiplicities M i andslop e or temperature parameters T i for the low-energy (evaporative, i = 1) andhigh-energy (pre-equilibrium, i = 2) parts, respectively. M 1 increases with A, proportional to the nuclear volume, and M 2 is growing with A 1/3, proportional to the nuclear radius. The T parameters are nearly independent of A. The results are comparedwith previous multiplicity measurements with a 4π neutron detector, intranuclear cascade calculations and neutron spectra from stoppedan tiproton annihilation on nuclei. With the measuredproton spectra also the ratio of emitted neutrons to protons was determined for Au.

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Author information

Author notes

  1. P. Figuera

    Present address: INFN-Laboratorio Nazionale del Sud, I-95123, Catania, Italy

  2. F. Goldenbaum

    Present address: Forschungszentrum Jülich, Institut für Kernphysik, D-52428, Jülich, Germany

  3. X. Ledoux

    Present address: DPTA/SPN, Commissariat à l’Energie Atomique, F-91680, Bruyères-le-Châtel, France

Authors and Affiliations

  1. Physik-Department, Technische Universität München, D-85748, Garching, Germany

    T. von Egidy, M. Hasinoff, M. Krause, L. Maier, M. Manrique de Lara & W. Schott

  2. Hahn-Meitner-Institut Berlin, D-14109, Berlin, Germany

    P. Figuera, F. Goldenbaum, D. Hilscher & U. Jahnke

  3. GANIL, IN2P3/CNRS-DSM/CEA, F-14076, Caen, France

    J. Galin, X. Ledoux, B. Lott & B. Quednau

  4. Institute for Nuclear Research, Russian Academy of Sciences, 117312, Moscow, Russia

    Ye. S. Golubeva & A. S. Iljinov

  5. University of British Columbia, Vancouver, B.C., Canada, V6T 1Z1

    M. Hasinoff

  6. Institute of Experimental Physics, Warsaw University, PL-00-681, Warszawa, Poland

    W. Kurcewicz

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

    G. Pausch

  8. Heavy Ion Laboratory, Warsaw University, Pl-02-097, Warszawa, Poland

    L. Pienkowski

  9. University of Rochester, NY, 14627, USA

    W. U. Schröder & J. Tõke

Authors
  1. T. von Egidy
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  2. P. Figuera
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  3. J. Galin
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  4. F. Goldenbaum
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  5. Ye. S. Golubeva
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  6. M. Hasinoff
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  7. D. Hilscher
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  8. A. S. Iljinov
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  9. U. Jahnke
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  10. M. Krause
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  11. W. Kurcewicz
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  12. X. Ledoux
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  13. B. Lott
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  14. L. Maier
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  15. M. Manrique de Lara
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  16. G. Pausch
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  17. L. Pienkowski
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  18. B. Quednau
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  19. W. Schott
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  20. W. U. Schröder
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  21. J. Tõke
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Communicated by D. Schwalm

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von Egidy, T., Figuera, P., Galin, J. et al. Neutrons produced by 1.22 GeV antiproton interactions with nuclei. Eur. Phys. J. A 8, 197–204 (2000). https://doi.org/10.1007/s100500070106

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  • DOI: https://doi.org/10.1007/s100500070106

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