Atomic and nuclear properties of materials:
Lithium (Li)

Quantity	Value	Units	Value	Units
Atomic number	3
Atomic mass	6.941(2)	g mole-1
Density	0.534	g cm-3
Mean excitation energy	40.0	eV
Minimum ionization	1.639	MeV g-1cm2	0.8750	MeV cm-1
Nuclear collision length	52.2	g cm-2	97.69	cm
Nuclear interaction length	71.3	g cm-2	133.6	cm
Pion collision length	79.1	g cm-2	148.2	cm
Pion interaction length	103.3	g cm-2	193.4	cm
Radiation length	82.78	g cm-2	155.0	cm
Critical energy	149.06	MeV (for e-)	145.33	MeV (for e+)
Molière radius	11.78	g cm-2	22.05	cm
Plasma energy	13.84	eV
Muon critical energy	1578.	GeV
Melting point	453.6	K	180.5	C
Boiling point @ 1 atm	1615.	K	1342.	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
Table of isotopes Warning: may not be current
x ray mass attenuation coefficients