The en-riched 58Ni powders are dissolved in acid solution and coated on a Cu target for proton irradiation at cyclotron to produce 57Co radioisotope. The condition of the plating bath and the coating process are determined using the en-riched powders. To establish the coating conditions for 57Co, non-radioactive Co ions are dissolved in an acid solution and electroplated on to a rhodium plate. The thermal diffusion of electroplated Co into a rhodium matrix was studied to apply a 57Co Mssbauer source. The diffusion depth from surface to matrix of Co is depended on the annealing temperature and time. The deposited Co atoms diffuse completely into a rhodium (Rh) matrix without substantial loss at an annealing temperature of 1200 for 4 hours.

Based on the results of the prior study, we conducted a study of the DRE (destruction and removal efficiency) and carbonization of xylene using high electron beam energies. The irradiation intensity of electron beam energy was 30 mA, and the irradiation times were 5.7, 11.4, 22.8, and 45.6 sec. The absorbed dose were 124.23, 248.46, 496.91, and 993.83 kGy. Xylene was completely removed at 248.46 kGy, and the main by-products were carbon particles. Carbon particle formation was increased with increased absorbed dos. The carbon particles were generated as fine particles with a size of 0.5 to 1.0 μm. The most common oby-products of these particle were carbon black and graphite.

This study is to identify the effects of DRE (destruction and removal efficiency) and carbonization of Xylene when using the electron beam energy. The irradiation intensity of electron beam energy was 10 mA, 20 mA and irradiation time was 5.7, 11.4, 22.8, 45.6 sec (Absorbed dose are 41.41, 82.82, 165.64, 331.28, 662.55 kGy). The Xylene was completely removed at 331.28 kGy. Main by-products was carbon particles. Carbon particle formation was increased with irradiation intensity increasing. Most of the by-products of particle were Carbon black and Graphite.

Sulfur hexafluoride has an extremely high global warming potential (GWP) because of strong absorption of infraredradiation and long atmospheric lifetime which cause the global warming effect. This study is to identify the effects ofdestruction and removal efficiency of SF6 by the addition of conditioning agent (oxygen, water vapor and hydrogen) whenusing the high ionization energy. The irradiation intensity of ionization energy was 2mA, 5mA, 10mA and 15mA. TheSF6 was completely removed with H2O and H2 gas injection at 2mA. Main by-products were HF and F2 gases. HF andF2 gas formation was increased with irradiation intensity increasing. Most of the by-products of particle were sulfur andmetal sulfate.