We have used a magnetic spectrometer to study the production of charged pions in collisions of 600-MeV neutrons with nuclei of Be, C, Al, Cu, and Pb over a wide range of angles. For these nuclei we have obtained at five angles (16, 30, 60, 90, and 123°) the spectra of pions of both signs, on the basis of which we have found the cross sections, atomic-number dependences, and angular distributions of pion production. The influence of a number of effects on the characteristics of pion production in nuclei is discussed. The analysis performed permits us to obtain a qualitative picture of the basic regulari- ties of pion production.
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Differential and double differential cross sections of positive pion production by 240 MeV protons on carbon and copper nuclei are measured. The energy dependence of differential cross section for copper nucleus at 90 deg angle within the 240-500 MeV energy range of protons and angular dependence of the integrated differential cross section are obtained. It is shown that the differential cross section at 250 MeV is 80 times less than that at 585 MeV
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A study of the reaction pi+ + d --> p + p has been performed in the energy range of 18 - 44 MeV. Total cross sections and differential cross sections at six angles have been measured at 15 energies with an energy increment of 1 - 2 MeV. This is the most systematic data set in this energy range. No structure in the energy dependence of the cross section has been observed within the accuracy of this experiment.
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