Atomic and nuclear properties of materials:
Iron (Fe)

Quantity	Value	Units	Value	Units
Atomic number	26
Atomic mass	55.845(2)	g mole-1
Density	7.87	g cm-3
Mean excitation energy	286.0	eV
Minimum ionization	1.451	MeV g-1cm2	11.43	MeV cm-1
Nuclear collision length	81.7	g cm-2	10.37	cm
Nuclear interaction length	132.1	g cm-2	16.77	cm
Pion collision length	107.0	g cm-2	13.59	cm
Pion interaction length	160.8	g cm-2	20.42	cm
Radiation length	13.84	g cm-2	1.757	cm
Critical energy	21.68	MeV (for e-)	21.00	MeV (for e+)
Molière radius	13.53	g cm-2	1.719	cm
Plasma energy	55.17	eV
Muon critical energy	347.	GeV
Melting point	1811.	K	1538.	C
Boiling point @ 1 atm	3134.	K	2861.	C

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
Table of isotopes Warning: may not be current
x ray mass attenuation coefficients