Atomic and nuclear properties of materials:
Lawrencium (Lr)
Atomic number 103  
Atomic mass [262.110(2)] g mole-1
Density ?? g cm-3
Mean excitation energy 1034.0 eV
Minimum ionization 1.096 MeV g-1cm2
Nuclear collision length 121.9 g cm-2
Nuclear interaction length 215.8 g cm-2
Pion collision length 144.6 g cm-2
Pion interaction length 241.8 g cm-2
Radiation length 5.45 g cm-2
Critical energy 6.26 MeV (for e-)
Molière radius 18.48 g cm-2
Plasma energy 67.59 eV
Muon critical energy 120. 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 = Z*10.0 eV assumed in calculating critical energies and dE/dx.
Table of isotopes Warning: may not be current