Collisions per diameter range for four size distributions, varying β₁. Each panel reports the corresponding size distribution exponents and the total number of collisions N_COLL in that distribution. Colors indicate the logarithm of the fraction of the panel maximum, with absolute maxima N_MAX annotated in each panel. The absolute number of collisions can be recovered by multiplying the panel maximum by the value corresponding to a given color. Diameter bins were generated using 100 logarithmically spaced steps between r_min and R_LR for each distribution.