Atomic and nuclear properties of Freon-12B2 (CF2Br2)
QuantityValueUnits ValueUnits
<Z/A> 0.44901     
Specific gravity (20° C, 1 atm) 1.800 g cm-3   
Mean excitation energy 284.9 eV   
Minimum ionization 1.445 MeV g-1cm2 2.601 MeV cm-1
Nuclear collision length 81.2 g cm-2 45.09 cm
Nuclear interaction length 129.9 g cm-2 72.16 cm
Pion collision length 107.0 g cm-2 59.45 cm
Pion interaction length 160.0 g cm-2 88.90 cm
Radiation length 13.60 g cm-2 7.556 cm
Critical energy 21.70 MeV (for e-) 21.05 MeV (for e+)
Molière radius 13.29 g cm-2 7.383 cm
Plasma energy ℏωp 25.91 eV   
Muon critical energy 343. GeV   
Composition:
Elem ZAtomic frac* Mass frac
C
6
1.00
0.057245
F
9
2.00
0.181096
Br
 35
2.00
0.761659
* calculated from mass fraction data

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