Radiochemical Reactions Between Tritium Molecule and Carbon Dioxide

To have better understanding of radiochemical reactions among oxygen baking products in a fusion reactor, reactions in equimolar tritium molecule (T₂) and carbon dioxide (CO₂) were examined by laser Raman spectroscopy and mass spectrometry. After mixing them at room temperature, T₂ and CO₂ decreased rapidly in the first 30 minutes and then the reactions between them became much slower. As the predominant products of the reactions, carbon monoxide (CO) and tritiated water (T₂O) were found in gaseous phase and condensed phase, respectively. However, there likely existed also some solid products that were thermally decomposed into CO, CO₂, T₂, T₂O, etc. during baking up to 523 K.