Atomic and nuclear properties of materials:
Praseodymium (Pr)
QuantityValueUnits ValueUnits
Atomic number 59     
Atomic mass 140.90765(2) g mole-1   
Density 6.71 g cm-3   
Mean excitation energy 535.0 eV   
Minimum ionization 1.244 MeV g-1cm2 8.344 MeV cm-1
Nuclear collision length 102.7 g cm-2 15.31 cm
Nuclear interaction length 176.1 g cm-2 26.24 cm
Pion collision length 126.7 g cm-2 18.89 cm
Pion interaction length 203.3 g cm-2 30.30 cm
Radiation length 7.76 g cm-2 1.156 cm
Critical energy 10.21 MeV (for e-) 9.87 MeV (for e+)
Molière radius 16.11 g cm-2 2.401 cm
Plasma energy 48.30 eV   
Muon critical energy 183. 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