Figure 5
From: Medium-thickness-dependent proton dosimetry for radiobiological experiments

Variations of calibration coefficient R in (a) cytoplasm and (b) nucleus of cells for proton with incident energies of 10, 15 and 20 MeV, showing the maximum R values. (The lines connecting the points do not represent data and are only presented to help the eye). (Note: error bars are smaller than the symbols).