  The influence of Bose-Einstein statistics on multi-particle production
characterized for various systems and energies by the STAR collaboration
provides interesting information about the space-time dynamics of relativistic
heavy-ion collisions at RHIC. We present the centrality and transverse mass
dependence measurements of the two-pion interferometry in Au+Au collisions at
$\sqrt{s_{\rm{NN}}}$ = 62.4 GeV and Cu+Cu collisions at $\sqrt{s_{\rm{NN}}}$ =
62.4 GeV and 200 GeV. We compare the new data with previous STAR measurements
from p+p, d+Au and Au+Au collisions at $\sqrt{s_{\rm{NN}}}$ = 200 GeV. In all
systems and centralities, HBT radii decrease with transverse mass in a similar
manner, which is qualitatively consistent with collective flow.The scaling of
the apparent freeze-out volume with the number of participants and charged
particle multiplicity is studied. Measurements of Au+Au collisions at same
centralities and different energies yield different freeze-out volumes, which
mean that $N_{part}$ is not a suitable scaling variable. The multiplicity
scaling of the measured HBT radii is found to be independent of colliding
system and collision energy.
