  With the aid of simple numerical models, we discuss a particular aspect of
the interaction between stellar orbital periods inside elliptical galaxies (Es)
and the parent cluster tidal field (CTF), i.e., the possibility that
collisionless stellar evaporation from Es is an effective mechanism for the
production of the recently discovered intracluster stellar populations (ISP).
These very preliminary investigations, based on idealized galaxy density
profiles (such as Ferrers density distributions) show that, over an Hubble
time, the amount of stars lost by a representative galaxy may sum up to the 10%
of the initial galaxy mass, a fraction in interesting agreement with
observational data. The effectiveness of this mechanism is due to the fact that
the galaxy oscillation periods near its equilibrium configurations in the CTF
are of the same order of stellar orbital times in the external galaxy regions.
