Atomic and nuclear properties of materials:
Ytterbium (Yb)

Quantity	Value	Units	Value	Units
Atomic number	70
Atomic mass	173.04(3)	g mole-1
Specific gravity	6.73	g cm-3
Minimum ionization	1.160	MeV g-1cm2	7.804	MeV cm-1
Nuclear collision length	108.6	g cm-2	16.13	cm
Nuclear interaction length	188.2	g cm-2	27.96	cm
Radiation length	7.02	g cm-2	1.043	cm
Critical energy	8.53	MeV (for e-)	8.22	MeV (for e+)
Molière radius	17.46	g cm-2	2.594	cm
Plasma energy	47.55	eV
Muon critical energy	161.	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
x ray mass attenuation coefficients