Atomic and nuclear properties of osmium (Os)
QuantityValueUnits ValueUnits
Atomic number 76     
Atomic mass 190.23(3) g mol-1   
Density 22.57 g cm-3   
Mean excitation energy 746.0 eV   
Minimum ionization 1.132 MeV g-1cm2 25.55 MeV cm-1
Nuclear interaction length 194.1 g cm-2 8.600 cm
Nuclear collision length 111.4 g cm-2 4.936 cm
Pion interaction length 220.5 g cm-2 9.770 cm
Pion collision length 134.8 g cm-2 5.974 cm
Radiation length 6.68 g cm-2 0.2959 cm
Critical energy 7.75 MeV (for e-) 7.47 MeV (for e+)
Muon critical energy 146. GeV   
Molière radius 18.26 g cm-2 0.8091 cm
Plasma energy ωp 86.53 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
Table of isotopes via WIKIPEDIA
x ray mass attenuation coefficients from NIST