On radicals in gamma-irradiated potassium trimetaphosphate

The single crystal of K3P3O9 was irradiated by gamma-rays at room temperature. The pink colored crystal (absorption maximum at around 500 nm and esr spectrum with g=2.01 and a coupling constant of 36G.) was dissolved in aqueous iodide solutions and the liberated iodine was quantitatively measured. From the product analysis, the initial G values were determined as G(P4+)=G(P6+)=0.27+-0.05 at 200C. (auth.)