Limitations in predicting the space radiation health risk for exploration astronauts

Depth dose, energy, and linear energy transfer characteristics of protons. The range of proton energies relative to the body diameter (dotted lines) and bone marrow depth (ordinate) for mice, pigs, and humans for energies up to 60？MeV. Figure reprinted by permission from Conditions for RightsLink Permissions Springer Customer Service Center GmbH:Springer-Verlag3