Atomic and nuclear properties of copernicium (Cn)

Element 112 recognized by IUPAC May 2009, name recognized February 2010
Status of heaviest elements as of May 2014 (pdf)
Atomic number 112  
Atomic mass [285.174(5)] g mole-1
Specific gravity ?? g cm-3
Mean excitation energy 1156.0 eV
Minimum ionization 1.080 MeV g-1cm2
Nuclear collision length 124.9 g cm-2
Nuclear interaction length 222.0 g cm-2
Pion collision length 147.4 g cm-2
Pion interaction length 247.8 g cm-2
Radiation length 5.16 g cm-2
Critical energy 5.84 MeV (for e-)
Molière radius 18.75 g cm-2
Plasma energy ωp 67.57 eV
Muon critical energy 110. GeV
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 Jan 2007.
Note: Density 14.0 g/cm3 and Ieff = Z*10.0 eV assumed in calculating critical energies and dE/dx.
Table of isotopes Warning: may not be current