Atomic and nuclear properties of fluorine gas (F2)
QuantityValueUnits ValueUnits
Atomic number 9     
Atomic mass 18.998403163(6) g mole-1   
Specific gravity (20° C, 1 atm) 1.580E-03 g cm-3   
Mean excitation energy 115.0 eV   
Minimum ionization 1.676 MeV g-1cm2 2.649E-03 MeV cm-1
Nuclear collision length 65.0 g cm-2 4.110E+04 cm
Nuclear interaction length 97.4 g cm-2 6.164E+04 cm
Pion collision length 91.0 g cm-2 5.760E+04 cm
Pion interaction length 127.2 g cm-2 8.052E+04 cm
Radiation length 32.93 g cm-2 2.084E+04 cm
Critical energy 73.15 MeV (for e-) 71.48 MeV (for e+)
Molière radius 9.55 g cm-2 6040. cm
Plasma energy ωp 0.79 eV   
Muon critical energy 960. GeV   
Melting point 53.53 K -219.6 C
Boiling point @ 1 atm 85.03 K -188.1 C
Index of refraction (0° C, 1 atm, Na D) 195. (n-1)x106     
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