Atomic and nuclear properties of holmium (Ho)
QuantityValueUnits ValueUnits
Atomic number 67     
Atomic mass 164.93033(2) g mole-1   
Specific gravity 8.795 g cm-3   
Mean excitation energy 650.0 eV   
Minimum ionization 1.170 MeV g-1cm2 10.29 MeV cm-1
Nuclear collision length 107.2 g cm-2 12.18 cm
Nuclear interaction length 185.3 g cm-2 21.07 cm
Pion collision length 130.9 g cm-2 14.88 cm
Pion interaction length 212.3 g cm-2 24.13 cm
Radiation length 7.23 g cm-2 0.8224 cm
Critical energy 8.86 MeV (for e-) 8.55 MeV (for e+)
Molière radius 17.31 g cm-2 1.968 cm
Plasma energy ωp 54.47 eV   
Muon critical energy 165. GeV   
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