TY - JOUR
T1 - Search for p-nucleus states using the (p, p) knock-out reaction at 600 MeV/c
AU - Aslanides, E.
AU - Drake, D. M.
AU - Peng, J. C.
AU - Garreta, D.
AU - Birien, P.
AU - Bruge, G.
AU - Catz, H.
AU - Chaumeaux, A.
AU - Janouin, S.
AU - Legrand, D.
AU - Lemaire, M. C.
AU - Mayer, B.
AU - Pain, J.
AU - Perrot, F.
AU - Berrada, M.
AU - Bocquet, J. P.
AU - Monnand, E.
AU - Mougey, J.
AU - Perrin, P.
AU - Bing, O.
AU - Lichtenstadt, J.
AU - Yavin, A. I.
N1 - Funding Information:
The search for p-nuclear states formed by an antiproton and a nucleus, which are different from the well-known antiprotonic atom states bound by the Coulomb interaction, was made possible at the CERN low-energy antiproton ring (LEAR) with the availability of intense, pure, high-resolution antiproton beams. The favourable conditions for such states to exist are that the l~-nucleus interaction, described * Supported in part by the Fund for Basic Research of the Israel Academy of Sciences.
PY - 1987/8/31
Y1 - 1987/8/31
N2 - 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.
AB - 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.
KW - Nuclear reactions
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U2 - 10.1016/0375-9474(87)90580-X
DO - 10.1016/0375-9474(87)90580-X
M3 - Article
AN - SCOPUS:0010046760
SN - 0375-9474
VL - 470
SP - 445
EP - 460
JO - Nuclear Physics, Section A
JF - Nuclear Physics, Section A
IS - 3-4
ER -