Fig. 9. Yields of H₂ from the gamma irradiation of 0.50 M AHA in water () and 0.20 M HClO₄ (). The experimental data are divided into three regions: (A) 51 Gy min⁻¹ at 36 °C (solid curve), (B) 150 Gy min⁻¹ at 40 °C (dashed curve), and (C) 250 Gy min⁻¹ at 42 °C (dash–dot curve). Lines are predicted values from multiscale modelling calculations using eqn (20) (, ) and eqn (21) (, ) for the reaction of AHA + H˙ in 0.20 M HClO₄ and H₂O respectively.