1976 年 24 巻 5 号 p. 1097-1099
The SO4-radicals was formed in γ-irradiated H2SO4-SiO2 system at -196°. The formation of the SO3-radicals are accompanied when γ-irradiation is carried out after heat-treatment at 500°, indicating that H2SO4 on SiO2 is stable even at 500°.