Atomic and nuclear properties of materials:
Bismuth (Bi)
QuantityValueUnits ValueUnits
Atomic number 83     
Atomic mass 208.98040(1) g mole-1   
Density 9.75 g cm-3   
Mean excitation energy 823.0 eV   
Minimum ionization 1.128 MeV g-1cm2 10.99 MeV cm-1
Nuclear collision length 114.3 g cm-2 11.73 cm
Nuclear interaction length 200.2 g cm-2 20.54 cm
Pion collision length 137.6 g cm-2 14.11 cm
Pion interaction length 226.7 g cm-2 23.26 cm
Radiation length 6.29 g cm-2 0.6454 cm
Critical energy 7.39 MeV (for e-) 7.13 MeV (for e+)
Molière radius 18.04 g cm-2 1.851 cm
Plasma energy 56.70 eV   
Muon critical energy 141. 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
Table of isotopes Warning: may not be current
x ray mass attenuation coefficients