Absorbed dose due to heavy particles multiplied by factor C (Eq. (2)) takes in to account the fact that the phantoms have different masses and sizes. After doing so, we can compare the relative differences in absorbed dose rate that different phantoms would suffer if they were placed in to the same radiation field. Full lines correspond to silicon phantoms, while dashed lines are used for H₂O phantoms. The different shapes and sizes are indicated with colors. We see that the the relation between phantom size and measured dose has a non trivial dependence on particle type and energy. The calculated data indicates that the silicon phantom suffers a higher absorbed dose than the ICRU phantom for most particle types and energies.