Radial distribution (averaged over azimuth) of the dust particles as a function of time for the different planetary masses and for three representative particle sizes. The 10 M_⊕ planet is able to stop the pebbles efficiently, thus creating a transition disk, suggesting that the pebble isolation mass can be less than 10 M_⊕. The Stokes numbers at the planet location from left to right are 0.08, 1.23, and 67.2 after 100 planetary orbits, respectively.