FIG. 2.
Time evolution of the mean number of •OH radicals for irradiations with 1 MeV (left) and 100 MeV (right) protons for a dose of 50 cGy. Results for different pulse widths are shown: 0 ns (dashed), 1 ns (long dashed), 1 μs (dotted) and 10 μs (solid). Reference results calculated with protons delivered independently of each other are indicated by dashed-dotted lines. The times when a new history was generated are shown with impulse lines at the bottom; different amplitudes are shown to distinguish each option.