Atomic and nuclear properties of caesium (Cs)
QuantityValueUnits ValueUnits
Atomic number 55     
Atomic mass 132.90545196(6) g mol-1   
Density 1.873 g cm-3   
Mean excitation energy 488.0 eV   
Minimum ionization 1.254 MeV g-1cm2 2.349 MeV cm-1
Nuclear interaction length 172.8 g cm-2 92.25 cm
Nuclear collision length 101.2 g cm-2 54.01 cm
Pion interaction length 199.9 g cm-2 106.7 cm
Pion collision length 125.3 g cm-2 66.88 cm
Radiation length 8.31 g cm-2 4.434 cm
Critical energy 11.34 MeV (for e-) 10.97 MeV (for e+)
Muon critical energy 200. GeV   
Molière radius 15.53 g cm-2 8.292 cm
Plasma energy ωp 25.37 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