(a) Reaction probability for molecular beams of D2 dissociating on Ag(111) computed with the SRP48 functional. For comparison, experimental results [ ref 34 in paper] are plotted. Horizontal arrows and the number above these indicate the energy spacing between the theoretical reaction probability results and the interpolated experimental curve. (b) Energy distributions for two different set of beam parameters. The red curve shows the energy distribution (GH−dis E = 0.486 eV, σ = 2.61 × 10−3 eV) at the nozzle temperature 2012 K, and the blue curve presents the flux weighted velocity distributions GA−dis, for E = 0.449 eV, at the nozzle temperature 1975 K.