  Process of relaxation of Lennard-Jones cluster with an intrinsic pore was
investigated by molecular dynamics method for different phase states of an
initial cluster. Strong dependence of pore relaxation character on the initial
cluster phase state was demonstrated. It was shown that, for the initially
solid cluster, the system can reach metastable state where pore radius is fixed
at one of the discrete set of values. These values do not depend on initial
cluster temperature and size. Thus, it was demonstrated that, in a wide range
of cluster sizes, inside solid clusters "magic" pores can stabilize forming a
metastable state.
