Table 4.

Number of secondary particles at the downstream surface of the range shifter in percentage relative to protons simulated at source plane

	115 MeV		225 MeV
	Relative number (%)	$\overline{\mathrm{E}}$ (MeV)	Relative number (%)	$\overline{\mathrm{E}}$ (MeV)
Primary protons	91.04	54.6	92.43	193.5
Secondary protons	1.33	28.4	4.86	104.6
Neutrons	4.62	22.9	5.57	65.1
Electrons	5.55	0.1	4.82	0.2
Photons	5.34	1.1	5.15	1.0