Atomic and nuclear properties of polyethylene [(CH2CH2)n]
QuantityValueUnits ValueUnits
<Z/A> 0.57034     
Specific gravity 0.8900 g cm-3   
Mean excitation energy 57.4 eV   
Minimum ionization 2.079 MeV g-1cm2 1.850 MeV cm-1
Nuclear collision length 56.1 g cm-2 63.05 cm
Nuclear interaction length 78.5 g cm-2 88.18 cm
Pion collision length 83.7 g cm-2 94.07 cm
Pion interaction length 110.4 g cm-2 124.0 cm
Radiation length 44.77 g cm-2 50.31 cm
Critical energy 101.79 MeV (for e-) 99.13 MeV (for e+)
Molière radius 9.33 g cm-2 10.48 cm
Plasma energy ℏωp 20.53 eV   
Muon critical energy 1282. GeV   
Composition:
Elem ZAtomic frac* Mass frac
H
1
2.00
0.143711
C
6
1.00
0.856289
* calculated from mass fraction data

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