¹²⁵Xe(EC)¹²⁵Iで生ずるヨウ素イオンとメタンの反応に及ぼすγ線照射の効果

有機ヨウ素の生成と分解

抄録

Gamma ray-irradiations have been applied during and after the reactions of ¹²⁵I⁺ from the ¹²⁵Xe(EC)¹²⁵I process with methane in a gaseous phase. In the former case, the apparent yield of CH₃¹²⁵I, being the major product, decreased with an increase in the irradiation time. After ¹²⁵Xe contained in the sample has decayed out, any further irradiation had no significant influence on the distribution of products, and the yields stayed at constant values, depending upon the reaction systems. In the latter case, the yields of products were also influenced in a proportion to the total dose up to 6×10⁶R. Afterwards, the yields tended to be constant at similar values in the former case. The values at these equilibrium were as follows: In the system containing O₂, CH₃¹²⁵I; about 2%, and in the presence of SF₆, both CH₃¹²⁵I and C₂H₅¹²⁵I; about 10%. The latter product was noticed only in the absence of a radical scavenger. Thus, its formation will involve the reactions of radiolysis products from methane.