Atomic and nuclear properties of materials:
Rubber natural (C5H8)n
QuantityValueUnits ValueUnits
<Z/A> 0.55785     
Density 0.920 g cm-3   
Mean excitation energy 59.8 eV   
Minimum ionization 2.028 MeV g-1cm2 1.866 MeV cm-1
Nuclear collision length 56.6 g cm-2 61.56 cm
Nuclear interaction length 79.7 g cm-2 86.61 cm
Pion collision length 84.2 g cm-2 91.51 cm
Pion interaction length 111.6 g cm-2 121.3 cm
Radiation length 44.39 g cm-2 48.25 cm
Critical energy 98.55 MeV (for e-) 95.97 MeV (for e+)
Molière radius 9.55 g cm-2 10.38 cm
Plasma energy 20.64 eV   
Muon critical energy 1245. GeV   
Composition:
Elem ZAtomic frac* Mass frac*
H
1
8.00
0.118371
C
6
5.00
0.881629
* calculated from mass fraction data.

Explanation of some entries
For muons, dE/dx = a(E) + b(E) E. Tables of b(E): PS PDF TEXT
Table of muon dE/dx and Range: PS PDF TEXT