Atomic and nuclear properties of dysprosium (Dy)
QuantityValueUnits ValueUnits
Atomic number 66     
Atomic mass 162.500(1) g mol-1   
Density 8.551 g cm-3   
Mean excitation energy 628.0 eV   
Minimum ionization 1.175 MeV g-1cm2 10.05 MeV cm-1
Nuclear interaction length 184.4 g cm-2 21.56 cm
Nuclear collision length 106.7 g cm-2 12.48 cm
Pion interaction length 211.1 g cm-2 24.69 cm
Pion collision length 130.5 g cm-2 15.26 cm
Radiation length 7.32 g cm-2 0.8561 cm
Critical energy 9.02 MeV (for e-) 8.70 MeV (for e+)
Muon critical energy 167. GeV   
Molière radius 17.21 g cm-2 2.013 cm
Plasma energy ωp 53.70 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