A set of silicon detectors has been added to the PROMICE/WASA (P/W) experim
ent at CELSIUS. These detectors have been used for spectator-proton tagging
in proton deuteron collisions to investigate proton-neutron reactions at i
ntermediate energies. The performance of the setup has been tested by measu
ring the pd --> d pi(o)p(spectator) reaction.