Atomic and nuclear properties of paraffin (CH₃(CH₂)_n\approx23CH₃)

Quantity	Value	Units	Value	Units
<Z/A>	0.57275
Specific gravity	0.9300	g cm-3
Mean excitation energy	55.9	eV
Minimum ionization	2.088	MeV g-1cm2	1.942	MeV cm-1
Nuclear collision length	56.0	g cm-2	60.24	cm
Nuclear interaction length	78.3	g cm-2	84.14	cm
Pion collision length	83.6	g cm-2	89.92	cm
Pion interaction length	110.1	g cm-2	118.4	cm
Radiation length	44.85	g cm-2	48.22	cm
Critical energy	102.22	MeV (for e-)	99.54	MeV (for e+)
Molière radius	9.30	g cm-2	10.00	cm
Plasma energy ℏωp	21.03	eV
Muon critical energy	1288.	GeV

Composition:

Elem	Z	Atomic frac*	Mass frac
H	1	52.00	0.148605
C	6	25.00	0.851395
* 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