Study of mu-catalyzed fusion in H-D mixtures

Muon-catalyzed fusion was first observed in the pd mu system, and remains a good test of our understanding of the underlying molecular and nuclear pro cesses. In contrast to the dd mu and dt mu systems, no resonant behavior is expected, which considerably simplifies the dynamics. We will discuss data taken with solid H-D mixtures of 0.05%, 2%, 15% and 75% D-2. In these meas urements we observed simultaneously muons from pd mu --> mu + He-3 and gamm a s from pd mu --> mu He-3 + gamma. A simulation code incorporating the rel evant physics processes has been developed for the analysis of this data. P reliminary results are presented for the fusion and molecular formation rat es. This new data stringently tests the currently-accepted fusion scheme. A new value of the astrophysical S-factor is derived.