Atomic and nuclear properties of materials:
Plutonium (Pu)
QuantityValueUnits ValueUnits
Atomic number 94     
Atomic mass [244.06420(4)] g mole-1   
Density 19.8 g cm-3   
Mean excitation energy 921.0 eV   
Minimum ionization 1.071 MeV g-1cm2 21.25 MeV cm-1
Nuclear collision length 119.4 g cm-2 6.020 cm
Nuclear interaction length 210.8 g cm-2 10.62 cm
Pion collision length 142.3 g cm-2 7.174 cm
Pion interaction length 237.0 g cm-2 11.94 cm
Radiation length 5.93 g cm-2 0.2989 cm
Critical energy 6.49 MeV (for e-) 6.25 MeV (for e+)
Molière radius 19.36 g cm-2 0.9760 cm
Plasma energy 79.66 eV   
Muon critical energy 126. 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, [atomic mass] is that of the longest-lived known isotope as of Jan 2007.
Table of isotopes Warning: may not be current