Final distance of the surviving clumps (black dots) for all the simulations with point-mass clumps in a halo made of particles in the case of the spherical configuration (Sect. 4.4.3). The red crosses and lines show the initial and final distance of the six clumps studied in this section. The grey dotted line is at 1 kpc, the threshold that divides the surviving and the lost clumps.