Atomic and nuclear properties of berkelium (Bk)
Atomic number 97  
Atomic mass [247.07031(4)] g mole-1
Specific gravity ?? g cm-3
Mean excitation energy 952.0 eV
Minimum ionization 1.106 MeV g-1cm2
Nuclear collision length 119.9 g cm-2
Nuclear interaction length 211.6 g cm-2
Pion collision length 142.7 g cm-2
Pion interaction length 237.8 g cm-2
Radiation length 5.69 g cm-2
Critical energy 6.59 MeV (for e-)
Molière radius 18.32 g cm-2
Plasma energy ωp 67.56 eV
Muon critical energy 125. GeV
Melting point 1269. K
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 is no stable isotope, [atomic mass] is that of the longest-lived isotope known as of Aug 2015.
Table of isotopes Warning: may not be current