Elsevier

Nuclear Physics A

Volume 470, Issues 3–4, 31 August 1987, Pages 445-460
Nuclear Physics A

Search for p-nucleus states using the (p, p) knock-out reaction at 600 MeV/c

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Abstract

The knock-out reaction A(p, p)X has been used to search for narrow p-nucleus states. The experiment was performed using the 600 MeV/c antiproton beam at LEAR and the high-resolution and large-acceptance magnetic spectrometer SPES II. The A-dependence of the annihilation-induced proton spectra has been studied on 2H, 6Li, 12C, 63Cu, 208Pb and 209Bi. The quasi-free elastic pp scattering observed in the lighter targets, and the comparison with the free pp scattering, also observed in this experiment, determine an effective proton number Neff for 1s- and 1p-shell protons. No evidence for narrow bound or resonant p-nucleus states could be found. Upper limits for their production are one order of magnitude lower than certain theoretical predictions, but consistent with the properties of the p-nucleus interaction, as established from recent elastic and inelastic scattering as well as from studies of antiprotonic atoms.

References (21)

  • A.M. Green et al.

    Nucl. Phys.

    (1982)
  • H. Heiselberg

    Phys. Lett.

    (1983)
  • E. Aslanides
  • M. Cahay

    Phys. Lett.

    (1982)
    M. Cahay et al.

    Nucl. Phys.

    (1983)
  • M.R. Clover

    Phys. Rev.

    (1982)
  • G. Piragino
  • A. Bouyssy, private...
  • K. Nakamura

    Phys. Rev.

    (1985)
  • E.H. Auerbach et al.

    Phys. Rev. Lett.

    (1981)
  • C.Y. Wong

    Phys. Rev.

    (1984)
There are more references available in the full text version of this article.

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