  The presence of off-plane Ca II ions in the Beta Pictoris disk, and the
non-detection of off-plane Na I atoms, can be explained as a consequence of the
evaporation process of Falling Evaporating Bodies (FEBs). In the star-grazing
regime, the FEBs are subject to inclination oscillations up to 30 - 40 degrees
that causes most metallic species released by sublimation to move off plane The
ions are be stopped at about 100 AU from the star. We show that collisions with
a neutral medium can stop the ions. The required H I column density is reduced
to 10^17 cm^-2, one order of magnitude below present detection limits. We also
investigate the possibility that the ions are slowed down magnetically. While
the sole action of a magnetic field of the order of 1 microGauss is not
effective, the combined effect of magnetic and collisional deceleration
processes lead to an additional lowering of the required H I column density.
