Spectra of protons produced at SNRs from type Ia (top), type II (center), and type II* (bottom) SNRs for α = 4 (thick lines) and α = 4.3 (thin lines) if they were instantaneously liberated into the ISM (broken shell assumption). The dashed curves illustrate the effect of adiabatic losses in the downstream region, while the dotted lines refer to the escape flux from the upstream region. In the bottom part of each panel we also show the local slope of the spectrum q(p) at a given momentum.