Figure 9. Reaction probability as a function of the collision energy Ei for Θi =0◦ (top panel) and Θi =60◦ (bottom panel). vdW-DF2 results are reported as black empty diamonds. PBE and RPBE data (full red and green diamonds, respectively) for normal incidence are taken from Ref.15 . Experimental data are taken from Ref.7 (full blue squares) and Ref.8 (empty blue squares). Data are reported in ../Fig08/*dat