Atomic and nuclear properties of polyoxymethylene [(CH₂O)_n]

Quantity	Value	Units	Value	Units
<Z/A>	0.53287
Specific gravity	1.425	g cm-3
Mean excitation energy	77.4	eV
Minimum ionization	1.894	MeV g-1cm2	2.698	MeV cm-1
Nuclear collision length	58.8	g cm-2	41.25	cm
Nuclear interaction length	84.3	g cm-2	59.16	cm
Pion collision length	86.2	g cm-2	60.48	cm
Pion interaction length	116.2	g cm-2	81.57	cm
Radiation length	38.47	g cm-2	26.99	cm
Critical energy	79.63	MeV (for e-)	77.49	MeV (for e+)
Molière radius	10.24	g cm-2	7.188	cm
Plasma energy ℏωp	25.11	eV
Muon critical energy	1040.	GeV

Composition:

Elem	Z	Atomic frac*	Mass frac
H	1	2.00	0.067135
C	6	1.00	0.400017
O	8	1.00	0.532848
* 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