Atomic and nuclear properties of praseodymium (Pr)
QuantityValueUnits ValueUnits
Atomic number 59     
Atomic mass 140.90766(2) g mole-1   
Specific gravity 6.773 g cm-3   
Mean excitation energy 535.0 eV   
Minimum ionization 1.243 MeV g-1cm2 8.421 MeV cm-1
Nuclear collision length 102.7 g cm-2 15.17 cm
Nuclear interaction length 176.1 g cm-2 26.00 cm
Pion collision length 126.7 g cm-2 18.71 cm
Pion interaction length 203.3 g cm-2 30.02 cm
Radiation length 7.76 g cm-2 1.145 cm
Critical energy 10.21 MeV (for e-) 9.86 MeV (for e+)
Molière radius 16.11 g cm-2 2.379 cm
Plasma energy ωp 48.53 eV   
Muon critical energy 183. 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