Total neutron cross sections have been measured for the nuclei Be, C, O, Al, V, Mn, Co, Cu, Ag, Ce, Ta, Pb, Bi and U at 22 energies from 160 MeV to 575 MeV by the transmission method. The energy region contains the threshold for pion production. Different parametrizations of the experimental results are discussed. A test of charge symmetry was obtained from the proton- and neutron-induced cross sections on C and O, yielding 〈 (σ p − σ n ) σ p 〉 = 0.0012 ± 0.0059 .
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High yields of low-momentum pions were obtained from high-energy primary proton beams. The results are discussed, also with respect to the possibility of setting up cloud muon beams from the very lowmomentum poins produced by 10 GeV/c protons.
Data obtained with 30 cm long target.
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