A technique to measure the lifetimes of nuclear states with half lives <10 ps has been developed in conjunction with the TRISTAN mass separator at the High Flux Beam Reactor at BNL. The method uses fast plastic and BaF2scintillators and Ge detectors in a triple coincidence (&bgr;‐&ggr;‐&ggr;) fast‐slow counting system. The timing information is derived from the fast plastic‐BaF2coincidence, while the higher resolution of the Ge detector (in slow coincidence) serves to insure that the &bgr;‐&ggr; event lies in the cascade of interest. The calibrations and corrections necessary to achieve precise results and the methods of data reduction and results from recent measurements on theA=97 mass chain are presented.