Atomic and nuclear properties of materials:
Samarium (Sm)

Quantity	Value	Units	Value	Units
Atomic number	62
Atomic mass	150.36(2)	g mole-1
Density	7.46	g cm-3
Minimum ionization	1.210	MeV g-1cm2	9.029	MeV cm-1
Nuclear collision length	104.5	g cm-2	14.01	cm
Nuclear interaction length	179.8	g cm-2	24.10	cm
Pion collision length	128.4	g cm-2	17.21	cm
Pion interaction length	206.9	g cm-2	27.74	cm
Radiation length	7.57	g cm-2	1.015	cm
Critical energy	9.66	MeV (for e-)	9.33	MeV (for e+)
Molière radius	16.62	g cm-2	2.228	cm
Plasma energy	50.54	eV
Muon critical energy	176.	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