Distributions of the energy measured in ZNC (left) and ZNA (right) from the EMD events with a single proton detected, respectively, in ZPC and ZPA (points), and resulting fit functions (solid curves) representing the sum of all the Gaussians. The ZP energies associated with the detection of a single proton are determined as $[\mu_1 - 2\sigma_1, \mu_1 + 2\sigma_1]$. The Gaussians representing the contributions of individual 1n, 2n, 3n, 4n, and 5n peaks are shown by the dashed curves.