Fig. 4
The schematic flow diagram of Brownian dynamics of 222Rn and its progeny, modeled with steps of duration \(\Delta\)t. The lifespan of each atom is calculated based on its specific mean lifetime, using uniform random numbers \(\xi _{1}\), \(\xi _{2}\), \(\xi _{3}\), and \(\xi _{4}\). 214Po decays instantaneously to 210Pb.
