Atomic and nuclear properties of materials:
Cobalt (Co)

Quantity	Value	Units	Value	Units
Atomic number	27
Atomic mass	58.933195(5)	g mole-1
Density	8.90	g cm-3
Mean excitation energy	297.0	eV
Minimum ionization	1.419	MeV g-1cm2	12.63	MeV cm-1
Nuclear collision length	82.7	g cm-2	9.291	cm
Nuclear interaction length	134.2	g cm-2	15.08	cm
Pion collision length	107.9	g cm-2	12.13	cm
Pion interaction length	162.9	g cm-2	18.30	cm
Radiation length	13.62	g cm-2	1.530	cm
Critical energy	20.82	MeV (for e-)	20.16	MeV (for e+)
Molière radius	13.87	g cm-2	1.558	cm
Plasma energy	58.19	eV
Muon critical energy	336.	GeV

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