Data on inclusive reactions π−p → π± + … and π−n → π± + … at 40 GeV/c are presented. Inclusive cross sections of the reactions π−p → π± + … at x = 0 normalized to the inelastic cross section coincide with the ISR results for pp interactions at 500 – 1500 GeV. A similar result has been obtained for the inclusive process π−p → γ + … as well.

Data on the average multiplicity of neutral pions are presented for π−p, π−n and π−C interactions at 40 GeV/c, based on the statistics of 9 432 γ-quanta. A significant increase was found in the average number of π0s per inelastic event as a function of the number of charged particles for these interactions. Average momenta and angular characteristics of the γ-quanta are presented in both the lab. and the c.m. systems.

Data on the multiplicity of charged particles and π0 mesons in π−p and π−n interactions are presented and compared to various models. The average π0 multiplicity tends to increase with increasing number of charged particles.