Normalized fraction of O₂ and O₃ for the [O+O] reactive system obtained after TPD. The filled symbols represent the surface temperature variation (between 6.5 K and 25 K), while the empty symbols represent the dose variation (between 0.05 ML and 1.0 ML). The black dots represent the data of Minissale & Dulieu (2014), who reported the method in detail. Other points are adopted from Minissale et al. (2013), Minissale et al. (2014), and Congiu et al. (2014) or are original data. The solid black line represents the zone of the plot in which no chemical desorption is measured.