Fig. 9.

a) Logistic functions $\mathrm{F}(\mathrm{x},\mu ,\beta )$ with $\mathrm{x}=P_{avg}^{k_0}\cdot L^{k_1}\cdot V_s^{k_2}$ , in red obtained with data collected just after the irradiation and in black with data collected after 18 hours. b) Logistic functions $\mathrm{F}(\mathrm{x},\mu ,\beta )$ with ${\mathrm{x}}_L=P_{avg}^{k_0}\cdot V_s^{k_2}$ for each value of scanned lines L, with data collected after 18 hours.