Atomic and nuclear properties of materials:
Ethylene (C2H4)
QuantityValueUnits ValueUnits
<Z/A> 0.57034     
Specific gravity (20° C, 1 atm) 1.17E-03 g cm-3   
Minimum ionization 2.174 MeV g-1cm2 2.555E-03 MeV cm-1
Nuclear collision length 56.1 g cm-2 4.776E+04 cm
Nuclear interaction length 78.5 g cm-2 6.679E+04 cm
Radiation length 44.77 g cm-2 3.811E+04 cm
Critical energy 126.75 MeV (for e-) 124.06 MeV (for e+)
Molière radius 7.49 g cm-2 6375. cm
Plasma energy 0.75 eV   
Muon critical energy 1508. GeV   
Composition:
Elem ZAtomic frac* Mass frac*
H
1
4.00
0.143711
C
6
2.00
0.856289
* 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