PION TRANSFER FROM HYDROGEN TO DEUTERIUM IN H2O+D2O MIXTURES

The transfer of negative pions captured by hydrogen to deuterium has b een studied in H2O + D2O mixtures. The D2O-concentration dependence of the transfer rate was analyzed on the basis of a phenomenological mod el in order to determine the transfer parameters. The fit gives an asy mptotic transfer of about 42%, which is smaller than the previous resu lts, but slightly larger than the value for H-2 + D2 gas mixtures. A m esomolecular effect of HOD molecules was discussed on the basis of the concentration dependence of the transfer rate.