The production of A ( ~ 0 ) hyperons (henceforth denoted A hyperons for short) and K 0 mesons by negative pions on carbon was investigated. The angular and momentum distribu- tions of these particles and the cross sections for their production are determined, and the cross sections of the different channels of the reactions are estimated. The fraction of strange particles produced in the secondary processes is estimated for the first time. The momentum spectrum of the A hyperons (in the pion-nucleon c.m.s.) is compared with the spectrum for rr-p interactions. The experimental data are compared with the results of cascade-model calculations made by the Monte Carlo method.

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.