Atomic and nuclear properties of liquid oxygen (O2)
QuantityValueUnits ValueUnits
Atomic number 8     
Atomic mass 15.999(3) g mole-1   
Specific gravity 1.141 g cm-3   
Mean excitation energy 95.0 eV   
Minimum ionization 1.788 MeV g-1cm2 2.040 MeV cm-1
Nuclear collision length 61.3 g cm-2 53.75 cm
Nuclear interaction length 90.2 g cm-2 79.03 cm
Pion collision length 88.5 g cm-2 77.54 cm
Pion interaction length 121.9 g cm-2 106.8 cm
Radiation length 34.24 g cm-2 30.01 cm
Critical energy 66.82 MeV (for e-) 65.04 MeV (for e+)
Molière radius 10.87 g cm-2 9.522 cm
Plasma energy ωp 21.77 eV   
Muon critical energy 890. GeV   
Melting point 54.36 K -218.8 C
Boiling point @ 1 atm 90.20 K -182.9 C
Index of refraction (Na D) 1.224     
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
Note: Index of refraction at boiling point, 1 atm.
Table of isotopes Warning: may not be current
x ray mass attenuation coefficients