Atomic and nuclear properties of materials:
Polyimide film (C₂₂H₁₀N₂O₅)_n

Quantity	Value	Units	Value	Units
<Z/A>	0.51264
Density	1.42	g cm-3
Mean excitation energy	79.6	eV
Minimum ionization	1.820	MeV g-1cm2	2.584	MeV cm-1
Nuclear collision length	59.2	g cm-2	41.67	cm
Nuclear interaction length	85.5	g cm-2	60.20	cm
Pion collision length	86.5	g cm-2	60.91	cm
Pion interaction length	117.4	g cm-2	82.71	cm
Radiation length	40.58	g cm-2	28.57	cm
Critical energy	81.01	MeV (for e-)	78.84	MeV (for e+)
Molière radius	10.62	g cm-2	7.479	cm
Plasma energy	24.59	eV
Muon critical energy	1050.	GeV

Composition:

Elem	Z	Atomic frac*	Mass frac*
H	1	10.00	0.026362
C	6	22.00	0.691133
N	7	2.00	0.073270
O	8	5.00	0.209235
* 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