Atomic and nuclear properties of materials:
Rhodium (Rh)

Quantity	Value	Units	Value	Units
Atomic number	45
Atomic mass	102.90550(2)	g mole-1
Density	12.4	g cm-3
Mean excitation energy	449.0	eV
Minimum ionization	1.310	MeV g-1cm2	16.26	MeV cm-1
Nuclear collision length	94.7	g cm-2	7.631	cm
Nuclear interaction length	159.3	g cm-2	12.84	cm
Pion collision length	119.2	g cm-2	9.607	cm
Pion interaction length	187.1	g cm-2	15.08	cm
Radiation length	9.27	g cm-2	0.7466	cm
Critical energy	12.84	MeV (for e-)	12.41	MeV (for e+)
Molière radius	15.30	g cm-2	1.233	cm
Plasma energy	67.13	eV
Muon critical energy	221.	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