Results for core-collapse SNR. Top: the time evolution of volume-integrated CR spectra inside the SNR (denoted “snr”) and at the dense shell (denoted “sh”) for two different diffusion models (“D1”/“D2”) and two different distances from the SNR to the shell: 16 pc (“n”) and 30 pc (“f”). Bottom: the corresponding hadronic gamma-ray emission spectra. The thick solid lines represent the Galactic CR background and the corresponding gamma-ray emission from the dense shell, both of which still do not depend on time. The thin solid lines represent the spectra of CRs outside the SNR for the D2 model and the corresponding emission from ambient diffuse gas.