Atomic and nuclear properties of materials:
Meitnerium (Mt)
Atomic number 109  
Atomic mass [276.151(5)] g mole-1
Density ?? g cm-3
Mean excitation energy 1115.0 eV
Minimum ionization 1.090 MeV g-1cm2
Nuclear collision length 123.7 g cm-2
Nuclear interaction length 219.6 g cm-2
Pion collision length 146.4 g cm-2
Pion interaction length 245.5 g cm-2
Radiation length 5.23 g cm-2
Critical energy 5.97 MeV (for e-)
Molière radius 18.57 g cm-2
Plasma energy 67.74 eV
Muon critical energy 112. 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.
Note: Density 14.0 g/cm3 and Ieff = 1115 eV assumed in calculating critical energies and dE/dx.
Table of isotopes Warning: may not be current