Atomic and nuclear properties of materials:
Polycarbonate (Lexan, [OC₆H₄C(CH₃)₂C₆H₄OCO]n

Quantity	Value	Units	Value	Units
<Z/A>	0.52697
Density	1.20	g cm-3
Mean excitation energy	73.1	eV
Minimum ionization	1.886	MeV g-1cm2	2.263	MeV cm-1
Nuclear collision length	58.3	g cm-2	48.62	cm
Nuclear interaction length	83.6	g cm-2	69.63	cm
Pion collision length	85.7	g cm-2	71.46	cm
Pion interaction length	115.5	g cm-2	96.27	cm
Radiation length	41.50	g cm-2	34.59	cm
Critical energy	85.85	MeV (for e-)	83.57	MeV (for e+)
Molière radius	10.25	g cm-2	8.543	cm
Plasma energy	22.91	eV
Muon critical energy	1104.	GeV

Composition:

Elem	Z	Atomic frac*	Mass frac*
H	1	14.00	0.055491
C	6	16.00	0.755751
O	8	3.00	0.188758
* 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