Atomic and nuclear properties of materials:
Polyvinyl pyrrolidone (C₆H₉NO)_n

Quantity	Value	Units	Value	Units
<Z/A>	0.53984
Density	1.25	g cm-3
Mean excitation energy	67.7	eV
Minimum ionization	1.936	MeV g-1cm2	2.420	MeV cm-1
Nuclear collision length	57.9	g cm-2	46.33	cm
Nuclear interaction length	82.5	g cm-2	65.97	cm
Pion collision length	85.4	g cm-2	68.31	cm
Pion interaction length	114.4	g cm-2	91.55	cm
Radiation length	41.66	g cm-2	33.33	cm
Critical energy	88.16	MeV (for e-)	85.81	MeV (for e+)
Molière radius	10.02	g cm-2	8.017	cm
Plasma energy	23.67	eV
Muon critical energy	1133.	GeV

Composition:

Elem	Z	Atomic frac*	Mass frac*
H	1	9.00	0.081616
C	6	6.00	0.648407
N	7	1.00	0.126024
O	8	1.00	0.143953
* 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