The nuclear hyperfine population distributions of the deuterium atom produced in the 266 nm photolysis of DI were measured with a technique that applies spatial filtering of the nascent recoiling photoproducts to yield a reduced Doppler profile. A novel method of resonance detection for Cl atom photoproducts is also presented along with time-of-flight measurements of chlorine atoms as photoproducts from the dissociation of Cl2, thiophosgene, and phosgene. The resonance detection method permits high-resolution frequency scanning of the hyperfine structure of the chlorine atom. The results of these measurements are also presented
