Atomic and nuclear properties of materials:
Sodium (Na)
QuantityValueUnits ValueUnits
Atomic number 11     
Atomic mass 22.98976928(2) g mole-1   
Density 0.971 g cm-3   
Mean excitation energy 149.0 eV   
Minimum ionization 1.639 MeV g-1cm2 1.592 MeV cm-1
Nuclear collision length 67.4 g cm-2 69.46 cm
Nuclear interaction length 102.6 g cm-2 105.6 cm
Pion collision length 93.4 g cm-2 96.22 cm
Pion interaction length 132.2 g cm-2 136.2 cm
Radiation length 27.74 g cm-2 28.56 cm
Critical energy 51.38 MeV (for e-) 49.99 MeV (for e+)
Molière radius 11.45 g cm-2 11.79 cm
Plasma energy 19.64 eV   
Muon critical energy 712. 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 Warning: may not be current
x ray mass attenuation coefficients