Atomic and nuclear properties of materials:
Ytterbium (Yb)

Quantity	Value	Units	Value	Units
Atomic number	70
Atomic mass	173.054(5)	g mole-1
Density	6.90	g cm-3
Mean excitation energy	684.0	eV
Minimum ionization	1.159	MeV g-1cm2	8.001	MeV cm-1
Nuclear collision length	108.6	g cm-2	15.73	cm
Nuclear interaction length	188.2	g cm-2	27.26	cm
Pion collision length	132.2	g cm-2	19.15	cm
Pion interaction length	215.1	g cm-2	31.16	cm
Radiation length	7.02	g cm-2	1.017	cm
Critical energy	8.52	MeV (for e-)	8.22	MeV (for e+)
Molière radius	17.47	g cm-2	2.531	cm
Plasma energy	48.15	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 Warning: may not be current
x ray mass attenuation coefficients