Atomic and nuclear properties of polypropylene [(CH(CH3)CH2)n]
QuantityValueUnits ValueUnits
<Z/A> 0.55998     
Specific gravity 0.9050 g cm-3   
Mean excitation energy 57.4 eV   
Minimum ionization 2.041 MeV g-1cm2 1.847 MeV cm-1
Nuclear collision length 56.1 g cm-2 62.01 cm
Nuclear interaction length 78.5 g cm-2 86.72 cm
Pion collision length 83.7 g cm-2 92.51 cm
Pion interaction length 110.4 g cm-2 122.0 cm
Radiation length 44.77 g cm-2 49.47 cm
Critical energy 99.80 MeV (for e-) 97.18 MeV (for e+)
Molière radius 9.51 g cm-2 10.51 cm
Plasma energy ωp 20.51 eV   
Muon critical energy 1259. 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
Note: Chem formula wrong in Sternheimer. I and density effect constants
for polyethylene, scaled with density, were used for these calculations.