Table 2.

Calculated attenuation and re-population of GCR ion species using the PHITS model to simulate transport through aluminum.

Species	Charge-changing interaction probability in 20 g cm−2 Al	Attenuation in 20 g cm−2 Al (PHITS) including losses from ranging out	Attenuation in 20 g cm−2 Al (PHITS), Eincident >700 MeV/nuc
C	0.42	0.43	−0.02
O	0.46	0.49	0.17
Mg	0.50	0.59	0.30
Si	0.52	0.61	0.36
Fe	0.62	0.69	0.51