Atomic and nuclear properties of terbium (Tb)
QuantityValueUnits ValueUnits
Atomic number 65     
Atomic mass 158.92535(2) g mol-1   
Density 8.230 g cm-3   
Mean excitation energy 614.0 eV   
Minimum ionization 1.188 MeV g-1cm2 9.778 MeV cm-1
Nuclear interaction length 183.0 g cm-2 22.24 cm
Nuclear collision length 106.1 g cm-2 12.89 cm
Pion interaction length 209.8 g cm-2 25.49 cm
Pion collision length 129.9 g cm-2 15.78 cm
Radiation length 7.36 g cm-2 0.8939 cm
Critical energy 9.17 MeV (for e-) 8.85 MeV (for e+)
Muon critical energy 169. GeV   
Molière radius 17.00 g cm-2 2.066 cm
Plasma energy ωp 52.87 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