Radiation decomposition of trichlorofluoromethane in flow system under 60Co gamma-ray irradiation.

Irradiation experiments of CCl3F were carried out with 60Co gamma-rays using the irradiation facility of the flow system. In the system, CCl3F was irradiated at 5.7 kGg/h (5.7 X 10(5) rad/h) and -30 degrees C. The decomposition behavior of CCl3F and the influence of impurities in the circulating gas on the decomposition were examined. The result was compared with that of ampoule scale. The decomposition yield of CCl3F and the yields of radiolytic products (fluorocarbons) increased in proportion to the absorbed dose. The decomposition yield per Mrad of CCl3F was 0.0246 mol%/Mrad (G = 2.9). This value was equal to 1.8 times that of the ampoule scale. The marked influence of impurities (air, CH4, I2) was recognized for the yields of halogen ions.