Atomic and nuclear properties of materials:
Iodine (I )

Quantity	Value	Units	Value	Units
Atomic number	53
Atomic mass	126.90447(3)	g mole-1
Density	4.93	g cm-3
Mean excitation energy	491.0	eV
Minimum ionization	1.263	MeV g-1cm2	6.226	MeV cm-1
Nuclear collision length	100.0	g cm-2	20.27	cm
Nuclear interaction length	170.3	g cm-2	34.53	cm
Pion collision length	124.1	g cm-2	25.18	cm
Pion interaction length	197.7	g cm-2	40.11	cm
Radiation length	8.48	g cm-2	1.720	cm
Critical energy	11.42	MeV (for e-)	11.04	MeV (for e+)
Molière radius	15.75	g cm-2	3.194	cm
Plasma energy	41.35	eV
Muon critical energy	200.	GeV
Melting point	386.8	K	113.7	C
Boiling point @ 1 atm	457.5	K	184.4	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