  Nuclear stopping has been investigated in central symmetric nuclear
collisions at intermediate energies. Firstly, it is found that the isotropy
ratio, Riso, reaches a minimum near the Fermi energy and saturates or slowly
increases depending on the mass of the system as the beam energy increases. An
approximate scaling based on the size of the system is found above the Fermi
energy suggesting the increasing role of in-medium nucleon-nucleon collisions.
Secondly, the charge density distributions in velocity space, dZ/dvk and
dZ/dv?, reveal a strong memory of the entrance channel and, as such, a sizeable
nuclear transparency in the intermediate energy range. Lastly, it is shown that
the width of the transverse velocity distribution is proportional to the beam
velocity.
