Figure 1

Panels (a) and (c) show theenergy depositions in the PMD module for 3 GeV pions and 3 GeVelectrons, respectively. The pion distribution is fitted with a Landau fit, which givesthe most probable value (MPV) of energy depositions bycharged particles. For electrons, the result from the simulation issuperimposed on the experimental data. Panels (b) and (d) show thenumber of cells hit for 3 GeV pions and 3 GeV electrons, respectively Note the large difference in scales in the abscissa for pions and electrons