Ichikawa p17
                         |  C    |  Cu
-------------------------+-------+------
Target Thickness [um]    | 400   | 80
Rad. Len.        [g/cm2] | 42.70 | 12.86
Density          [g/vm3] | 2.210 | 8.960
Int. Len.        [g/cm2] | 85.8  | 137.3
Rad.             [%]     | 0.21  | 0.56
Int.             [%]     | 0.10  | 0.05

* Rad. = Target_Thickness x Density / Rad_Len
  Int. = Target_Thickness x Density / Int_Len