Atomic and nuclear properties of plutonium (Pu)
QuantityValueUnits ValueUnits
Atomic number 94     
Atomic mass [244.06420(4)] g mol-1   
Density 19.84 g cm-3   
Mean excitation energy 921.0 eV   
Minimum ionization 1.071 MeV g-1cm2 21.25 MeV cm-1
Nuclear interaction length 210.8 g cm-2 10.62 cm
Nuclear collision length 119.4 g cm-2 6.020 cm
Pion interaction length 236.6 g cm-2 11.93 cm
Pion collision length 142.3 g cm-2 7.174 cm
Radiation length 5.93 g cm-2 0.2989 cm
Critical energy 6.49 MeV (for e-) 6.25 MeV (for e+)
Muon critical energy 126. GeV   
Molière radius 19.36 g cm-2 0.9760 cm
Plasma energy ωp 79.66 eV   
For muons, dE/dx = a(E) + b(E) E. Tables of b(E): PDF TEXT
Table of muon dE/dx and Range: PDF TEXT
Explanation of some entries
Note: Since there are no stable isotopes, [atomic mass] is that of the longest-lived isotope known as of Jun 2017.
Table of isotopes via WIKIPEDIA