  Exact diagonalization studies of the level density in a six-electron quantum
dot under magnetic fields around 7 T (``filling factor'' around 1/2) are
reported. In any spin-polarization channel, two regimes are visible in the dot
excitation spectrum: one corresponding to interacting quasiparticles (i.e.
composite fermions) for excitation energies below 0.4 meV, and a second one for
energies above 0.4 meV, in which the level density (exponentially) increases at
the same rate as in the non-interacting composite-fermion model.
