Atomic and nuclear properties of materials:
Manganese (Mn)

Quantity	Value	Units	Value	Units
Atomic number	25
Atomic mass	54.938045(5)	g mole-1
Density	7.44	g cm-3
Mean excitation energy	272.0	eV
Minimum ionization	1.428	MeV g-1cm2	10.62	MeV cm-1
Nuclear collision length	81.4	g cm-2	10.94	cm
Nuclear interaction length	131.4	g cm-2	17.67	cm
Pion collision length	106.7	g cm-2	14.34	cm
Pion interaction length	160.2	g cm-2	21.54	cm
Radiation length	14.64	g cm-2	1.968	cm
Critical energy	22.59	MeV (for e-)	21.89	MeV (for e+)
Molière radius	13.74	g cm-2	1.847	cm
Plasma energy	53.02	eV
Muon critical energy	358.	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