Atomic and nuclear properties of materials:
Bromine liquid (Br₂) (Br)

Quantity	Value	Units	Value	Units
Atomic number	35
Atomic mass	79.904(1)	g mole-1
Density	3.10	g cm-3
Mean excitation energy	357.0	eV
Minimum ionization	1.380	MeV g-1cm2	4.281	MeV cm-1
Nuclear collision length	88.9	g cm-2	28.66	cm
Nuclear interaction length	147.2	g cm-2	47.45	cm
Pion collision length	113.8	g cm-2	36.67	cm
Pion interaction length	175.5	g cm-2	56.57	cm
Radiation length	11.42	g cm-2	3.681	cm
Critical energy	17.28	MeV (for e-)	16.75	MeV (for e+)
Molière radius	14.01	g cm-2	4.516	cm
Plasma energy	33.59	eV
Muon critical energy	281.	GeV
Melting point	265.9	K	-7.200	C
Boiling point @ 1 atm	331.9	K	58.78	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