Cadmium sulfide nano-particles with certain shapes have been sucessfully synthesized via r-ray irradiation in the non-water system. Absolute ethanol and a mixed solution of ethanol and benzene with the volume ratio of 1:1 are used as the solvents

and carbon disulfide and sulfur powders as the sulfur ions source

respectively. When the solutions are irradiated

carbon disulfide or sulfur element is reduced into S2- by the produced solvational electrons. CdS is precipitated through the combining reaction of S2- and Cd2+ ions. The investigation reveals that the phases and sizes of the products are affected by different solvents and sulfur ions sources.