Atomic and nuclear properties of arsenic (As)
QuantityValueUnits ValueUnits
Atomic number 33     
Atomic mass 74.921595(6) g mole-1   
Specific gravity 5.730 g cm-3   
Mean excitation energy 347.0 eV   
Minimum ionization 1.370 MeV g-1cm2 7.851 MeV cm-1
Nuclear collision length 87.5 g cm-2 15.28 cm
Nuclear interaction length 144.4 g cm-2 25.19 cm
Pion collision length 112.5 g cm-2 19.63 cm
Pion interaction length 172.7 g cm-2 30.14 cm
Radiation length 11.94 g cm-2 2.084 cm
Critical energy 17.65 MeV (for e-) 17.09 MeV (for e+)
Molière radius 14.35 g cm-2 2.504 cm
Plasma energy ωp 45.78 eV   
Muon critical energy 290. 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 Warning: may not be current
x ray mass attenuation coefficients