Atomic and nuclear properties of materials:
Beryllium (Be)

Quantity	Value	Units	Value	Units
Atomic number	4
Atomic mass	9.012182(3)	g mole-1
Density	1.85	g cm-3
Mean excitation energy	63.7	eV
Minimum ionization	1.595	MeV g-1cm2	2.947	MeV cm-1
Nuclear collision length	55.3	g cm-2	29.93	cm
Nuclear interaction length	77.8	g cm-2	42.10	cm
Pion collision length	82.4	g cm-2	44.60	cm
Pion interaction length	109.9	g cm-2	59.47	cm
Radiation length	65.19	g cm-2	35.28	cm
Critical energy	113.70	MeV (for e-)	110.68	MeV (for e+)
Molière radius	12.16	g cm-2	6.579	cm
Plasma energy	26.10	eV
Muon critical energy	1328.	GeV
Melting point	1560.	K	1287.	C
Boiling point @ 1 atm	2744.	K	2471.	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