Production of pions in hadron-nucleus interactions at initial momenta from 1 to 9 GeV/c

Data on the pion yields (with ..beta..>0.7) from nuclei under the action of protons and ..pi../sup + -/-mesons with momenta from 1 to 9 GeV/c are reported and discussed. The dependences of the pion production cross sections on the emission angle, atomic number of the target nucleus, and incident-particle momentum are in many respects similar to those for nucleon-production cross sections. At the incident-particle momenta p/sub 0/> or =4GeV/c the ratio of pion and nucleon yields is independent of the momentum and type of the incident hadron, although such a dependence is present for the yields themselves.