Electron beam pulse radiolysis of hydroxysemicarbazide

The kinetics of reactions between hydroxysemicarbazide (HSC) with water-radioactive particles (e_aq, · OH and · H) as well as single-electron oxidant · CO₃^- during pulse radiolysis were studied. The reactions are approximately quasi-first-order reactions, and the reaction rate constants are k (e_aq) = 1.41 × 10⁸ L/(mol · s), k (· OH) = 1.05 × 10¹⁰ L/(mol · s), k (· H) = 2.68 × 10⁵ L/(mol · s), k (· CO₃^-) = 4.25 × 10⁸ L/(mol · s), respectively. Among them, the reaction rate constant of HSC and · OH is the largest, so the reaction of HSC and · OH is the main reaction during the pulse radiolysis process. (authors)