Atomic and nuclear properties of materials:
Liquid nitrogen (N₂) (N )

Quantity	Value	Units	Value	Units
Atomic number	7
Atomic mass	14.0067(2)	g mole-1
Density	0.807	g cm-3
Mean excitation energy	82.0	eV
Minimum ionization	1.813	MeV g-1cm2	1.463	MeV cm-1
Nuclear collision length	61.1	g cm-2	75.70	cm
Nuclear interaction length	89.7	g cm-2	111.1	cm
Pion collision length	88.4	g cm-2	109.5	cm
Pion interaction length	121.7	g cm-2	150.8	cm
Radiation length	37.99	g cm-2	47.07	cm
Critical energy	75.47	MeV (for e-)	73.49	MeV (for e+)
Molière radius	10.67	g cm-2	13.23	cm
Plasma energy	18.30	eV
Muon critical energy	982.	GeV
Melting point	63.15	K	-210.0	C
Boiling point @ 1 atm	77.29	K	-195.9	C
Index of refraction (@ STP, Na D)	1.20

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
Explanation of some entries
Note: Index of refraction at boiling point, 1 atm.
Table of isotopes Warning: may not be current
x ray mass attenuation coefficients