Lengths d, over which the species O, H, HO2, and H2O2 were distributed as function of the distance to the nozzle z. The values for dO, dH, dHO2, and dH2O2 were obtained from the width of the Gaussian fit of the radial scans through the effluent of the plasma jet for H2O2, and for HO2 (Klose et al. (2020b)), and from the measured spatial distributions for H and O atoms (Klose et al. (2020a)) - see Fig 10 in the publication.