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  1. The Attenuation Cross Sections of 37-Mev Pions in Hydrogen

    Angell, C. E. ; Perry, J. P. - Physical Review
    We previously reported 16.0±1.0 millibarns for the attenuation cross section of 37-Mev positive pions and 17.3±1.4 millibarns, for negative pions in hydrogen. Here we discuss an important correction.

  2. The Scattering of 40-Mev Positive Pions by Hydrogen

    Perry, J. P. ; Angell, C. E. - Physical Review
    In this work, differential scattering cross sections of hydrogen for 40 ± 3-Mev positive pions have been measured at laboratory angles of 45, 60, 90, 120, and 140 degrees.

  3. The Total Cross Sections of Positive Pions in Hydrogen

    Barnes, S. W. ; Clark, D. L. ; Perry, J. P. ; ... - Physical Review
    In this work, the total cross sections of positive pions in hydrogen have been measured for pion energies of 56 Mev and above. Here we report a similar, though preliminary, measurement made at a mean energy of 37 Mev.

  4. The Signs of the Phase Shifts for Pion-Proton Scattering

    Barnes, S. W. ; Angell, C. E. ; Perry, J. P. ; ... - Physical Review
    In principle, it is possible to determine the sign of the pion-proton nuclear interaction by measuring the effect of interference between the nuclear and Coulomb amplitudes in pion-proton scattering. The findings are discussed in this work.
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