Atomic and nuclear properties of materials:
Hafnium (Hf)
QuantityValueUnits ValueUnits
Atomic number 72     
Atomic mass 178.49(2) g mole-1   
Specific gravity 13.3 g cm-3   
Minimum ionization 1.152 MeV g-1cm2 15.33 MeV cm-1
Nuclear collision length 109.5 g cm-2 8.226 cm
Nuclear interaction length 190.1 g cm-2 14.28 cm
Radiation length 6.89 g cm-2 0.5177 cm
Critical energy 8.22 MeV (for e-) 7.93 MeV (for e+)
Molière radius 17.77 g cm-2 1.335 cm
Plasma energy 66.77 eV   
Muon critical energy 155. GeV   
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
x ray mass attenuation coefficients