  Neutron detection efficiency of superheated drops of Freon22 for neutrons
obtained from a 3Ci Am-Be neutron source has been reported in this paper.
Neutron detection efficiency of both F-22 and F-12 have been determined from
the measured nucleation rate using the volumetric method developed in our lab.
The result shows that the neutron detection efficiency of F-22 for the energy
spectrum obtained from Am-Be is almost double, while the life time is 58.6%
smaller than that of F-12, for a particular neutron flux of that source.
