  We analyze the thermal magnetization reversal processes in magnetic grains.
Two experiments are carried out: swtiching time and switching field
experiments. In both cases, we find that the simulated behavior is coherent
with existing experimental data (the streched exponent of the switching time
experiment increases with the temperature and is superior to unity; there
exists a master curve for the switching field experiment). Moreover, we
simulated magnetic grains in a region of parameters where no experimental data
are available. We find that the relaxation time distribution $P(\ln{\tau})$ is
gaussian, and we find the existence of a strong field regime.
