The decay of negative π-mesons stopped in light elements and insulators

摘要: Positive and negative beams of 170 MeV/c π-mesons, from which the π-mesons were selected by time-of-flight, stopped in Be, B4C, Teflon Al targets. The ratio numbers electrons produced positive beams, π-Μ-e decay, was determined for each these materials. Assuming that no decay occurs target, an upper limit one per cent is found probability either B4C or Teflon.