MEASUREMENT OF FORMATION RATES OF DD-MU AND PD-MU MESIC MOLECULES IN H D-GAS MIXTURES/

The formation rates of muonic molecules pd mu and dd mu have been meas ured by means of a high-pressure ionization chamber at various deuteri um concentrations in equilibrated and non-equilibrated H/D-gas mixture s at 200 and 300 K. The measurements were performed on the muon beam o f the PNPI synchrocyclotron in 1986-1991. The low pd mu. formation rat e and its dependence on the type of mixture was discussed in Oxford, M CF-89. In detailed analysis it was found that the dd mu formation rate in an H/D gas mixture is lower than in pure deuterium. These measurem ents are of special interest in connection with the experiment being p repared at PSI.