@article{14e4580868894ee3b718178ecc3acbdd,
title = "Scattering of antiprotons from carbon at 46.8 MeV",
abstract = "Antiproton-carbon elastic and inelastic scattering cross sections have been measured at 46.8 MeV over an angular range 6° ≤ θ ≤ 59° with a magnetic spectrometer. Fits to the elastic and inelastic 4.44 MeV excited state cross sections put realistic limits on the strengths of the real and imaginary parts of the antiproton-carbon optical potential. The continuum cross section due to carbon break-up appears to be smaller than it is for corresponding proton data.",
author = "D. Garreta and P. Birien and G. Bruge and A. Chaumeaux and Drake, {D. M.} and S. Janouin and D. Legrand and Mallet-Lemaire, {M. C.} and B. Mayer and J. Pain and Peng, {J. C.} and M. Berrada and Bocquet, {J. P.} and E. Monnand and J. Mougey and P. Perrin and E. Aslanides and O. Bing and A. Erell and J. Lichtenstadt and Yavin, {A. I.}",
note = "Funding Information: I Permanent address' Los Alamos National Laboratory. New Mexico, USA. Supported in part by the US Department of Energy. 2 Supported by the Israel Fund for Da~xc Research *1 Recent reviews of both theoretical and experimental as-pects of antiproton physics are given in ref \[1\] From the theoretical point of view, the uncertainties in treating annihilation produce large ambiguities in the determination of the antiproton-nucleus potential. Calculations which involve the folding of the NN interaction with the matter density distribution of the nucleus lead to real potentials which range from strongly attractive to repulsive values \[2,6\].I n a relativistic mean field approach \[7,8\],t he antiproton-nucleus potential results essentially from changing the sign of the vector-meson contribution to the interaction. In such a prescription the real part of the potential is predicted to be strongly attractwe but the annihilation is still treated phenomenologicaUy. Another theoretical difficulty is the unknown distortion of the basic NN interaction in the nuclear medium. From the experimental point of view, data used to construct the optical model potential come from level shifts and widths of antiprotonic atoms \[9\]a nd from absorption cross sections \[i0\].H owever, in a recent paper \[6\]i t has been shown that antiprotonic atom data are only sensitwe to the peripheral part of the potential, leaving great uncertainties about the interior, and that absorption cross sections, too, appear to be very insensitive to the details of the interaction. Elastic and inelastic scattering data may strongly constrain the antiproton-nucleus interaction. This letter reports on a first measurement of the elastic and inelastic scattering of 46 8 MeV antiprotons by 12C performed during a test run of the LEAR facility at CERN. The 309.4 MeV/c antiproton beam intensity ranged from 2 × 104 to 5 X 104 antlprotons per second. We received a total of 3 5 × 108 antlpro-tons on target during less than three hours The incident antlprotons were counted by a 0.36 mm thick scintillator (S1) located 25 cm in front of a 0.318 g/ cm 2 thick graphite target. Scattered antiprotons were momentum-analysed by the magnetic spectrom-",
year = "1984",
month = feb,
day = "9",
doi = "10.1016/0370-2693(84)90388-5",
language = "אנגלית",
volume = "135",
pages = "266--270",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "Elsevier B.V.",
number = "4",
}