Fig. 2

Inactivation ratio of E. coli O1 in the exponential phase as a function of dose for dose rates of 147 mGy/s (red circles), 35.2 mGy/s (green circles), and 15.3 mGy/s (blue circles). (a) Solid lines represent the theoretical fits obtained with the nonlinear mutual destruction term, using parameters \(\small {{\Gamma }}_{0}=3.3\times {10}^{-2}\)(Gy⁻¹), \(\small {{\Gamma }}_{1}=1.0\times {10}^{-3}\) (Gy^−1/2s^−1/2), and \(\small {{\Gamma }}_{2}=6.7\times {10}^{-4}\) (s⁻¹). (b) Broken lines are the theoretical fits without the nonlinear mutual destruction term, using parameters \(\small {{\Gamma }}_{0}=3.3\times {10}^{-2}\)(Gy⁻¹) and \(\small {{\Gamma }}_{2}=4.7\times {10}^{-4}\) (s⁻¹).