Radiochemical reactions between tritium and carbon dioxide at elevated temperatures

昇温させた場合のトリチウムと二酸化炭素による自己放射化学反応

磯部 兼嗣; 中村 博文; 中道 勝; 山西 敏彦

Isobe, Kanetsugu; Nakamura, Hirofumi; Nakamichi, Masaru; Yamanishi, Toshihiko

373K, 473K, 573Kに昇温させた状態でのトリチウムと二酸化炭素の自己放射化学反応を、高純度のトリチウムガスを用いて調べた。実験は、ステンレス製の容器中にトリチウムと二酸化炭素を1:1の割合で混合させ、任意の時間経過した後のガスを四重極質量分析計で測定した。主な生成物として、一酸化炭素,水,メタンが測定され、これらの生成率に温度による違いはなかった。このことから373Kから573Kの温度範囲においては、自己放射化学反応に温度に対する依存性がないことが明らかとなった。

We focused on the reaction between tritium and carbon dioxide at elevated temperature, self-radiation reactions at 373, 473 and 573 K were investigated. Self-radiation experiment using high purity gaseous tritium was carried out in the chamber of stainless steel at atmospheric pressure and initial ratio between gaseous tritium and carbon dioxide was almost 1:1. After 2 weeks experiment, gas contents and these concentrations were measured with quadrupole mass spectrometer. Main products were carbon monoxide, water and methane. And production ratios of such products were almost same at any temperature. Therefore, it was found that self-radiation reaction between gaseous tritium and carbon dioxide is independent of temperature in the rage of 373-573 K.