Measurement of formation rates of ddµ and pdµ mesic molecules in H/D-gas mixtures

The formation rates of muonic molecules pdµ and ddµ have been measured by means of a high-pressure ionization chamber at various deuterium concentrations in equilibrated and non-equilibrated H/D-gas mixtures at 200 and 300 K. The measurements were performed on the muon beam of the PNPI synchrocyclotron in 1986–1991. The low pdµ formation rate and its dependence on the type of mixture was discussed in Oxford, MCF-89. In detailed analysis it was found that the ddµ formation rate in an H/D gas mixture is lower than in pure deuterium. These measurements are of special interest in connection with the experiment being prepared at PSI.