Atomic and nuclear properties of butane (C₄H₁₀)

Quantity	Value	Units	Value	Units
<Z/A>	0.59497
Specific gravity (20° C, 1 atm)	2.489E-03	g cm-3
Mean excitation energy	48.3	eV
Minimum ionization	2.278	MeV g-1cm2	5.670E-03	MeV cm-1
Nuclear collision length	55.5	g cm-2	2.231E+04	cm
Nuclear interaction length	77.1	g cm-2	3.098E+04	cm
Pion collision length	83.2	g cm-2	3.342E+04	cm
Pion interaction length	109.0	g cm-2	4.377E+04	cm
Radiation length	45.23	g cm-2	1.817E+04	cm
Critical energy	131.26	MeV (for e-)	128.44	MeV (for e+)
Molière radius	7.31	g cm-2	2935.	cm
Plasma energy ℏωp	1.11	eV
Muon critical energy	1557.	GeV
Melting point	134.9	K	-138.2	C
Boiling point @ 1 atm	272.6	K	-0.5000	C

Composition:

Elem	Z	Atomic frac*	Mass frac
H	1	10.00	0.173408
C	6	4.00	0.826592
* 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