Atomic and nuclear properties of materials:
Polonium (Po)
QuantityValueUnits ValueUnits
Atomic number 84     
Atomic mass [209.9829] g mole-1   
Specific gravity 9.32 g cm-3   
Minimum ionization 1.135 MeV g-1cm2 10.58 MeV cm-1
Nuclear collision length 114.5 g cm-2 12.29 cm
Nuclear interaction length 200.5 g cm-2 21.52 cm
Radiation length 6.19 g cm-2 0.6643 cm
Critical energy 7.33 MeV (for e-) 7.06 MeV (for e+)
Molière radius 17.91 g cm-2 1.922 cm
Plasma energy 55.64 eV   
Muon critical energy 139. 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
Note: Since there is no stable isotope, given atomic mass is that of the longest-lived known isotope as of Jan 2007.
Table of isotopes
x ray mass attenuation coefficients