Atomic and nuclear properties of materials:
Curium (Cm)

Quantity	Value	Units	Value	Units
Atomic number	96
Atomic mass	[247.07035(3)]	g mole-1
Density	13.5	g cm-3
Mean excitation energy	939.0	eV
Minimum ionization	1.082	MeV g-1cm2	14.61	MeV cm-1
Nuclear collision length	119.9	g cm-2	8.871	cm
Nuclear interaction length	211.6	g cm-2	15.66	cm
Pion collision length	142.7	g cm-2	10.56	cm
Pion interaction length	237.8	g cm-2	17.60	cm
Radiation length	5.79	g cm-2	0.4287	cm
Critical energy	6.44	MeV (for e-)	6.20	MeV (for e+)
Molière radius	19.07	g cm-2	1.411	cm
Plasma energy	66.02	eV
Muon critical energy	126.	GeV
Melting point	278.1	K	5.000	C

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
Note: Since there is no stable isotope, [atomic mass] is that of the longest-lived known isotope as of Jan 2007.
Table of isotopes Warning: may not be current