  We describe a particular aspect of the effects of the parent cluster tidal
field (CTF) on stellar orbits inside cluster Elliptical galaxies. In particular
we discuss, with the aid of a simple numerical model, the possibility that
collisionless stellar evaporation from elliptical galaxies is an effective
mechanism for the production of the recently discovered intracluster stellar
populations. A preliminary investigation, based on very idealized galaxy
density profiles (Ferrers density distributions), showed 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 equilibrium configurations in the CTF are
comparable to stellar orbital times in the external galaxy regions. Here we
extend our previous study to more realistic galaxy density profiles, in
particular by adopting a triaxial Hernquist model.
