Atomic and nuclear properties of materials:
Molybdenum (Mo)

Quantity	Value	Units	Value	Units
Atomic number	42
Atomic mass	95.96(2)	g mole-1
Density	10.2	g cm-3
Mean excitation energy	424.0	eV
Minimum ionization	1.329	MeV g-1cm2	13.59	MeV cm-1
Nuclear collision length	93.0	g cm-2	9.105	cm
Nuclear interaction length	155.8	g cm-2	15.25	cm
Pion collision length	117.7	g cm-2	11.51	cm
Pion interaction length	183.8	g cm-2	17.98	cm
Radiation length	9.81	g cm-2	0.9594	cm
Critical energy	13.85	MeV (for e-)	13.39	MeV (for e+)
Molière radius	15.01	g cm-2	1.469	cm
Plasma energy	60.94	eV
Muon critical energy	235.	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