Detection of Long-Range Fragments from Decay ofCf252

Long-range products from the decay of ${\mathrm{Cf}}^{252}$ have been observed by range discrimination and detection of tracks in mica and lexan. Integrated yields (events per binary fission) of $\gtrsim 18\times {10}^{-6\mathrm{}}$ and kinetic energies of 1.5-4 MeV/amu are indicated for fragments of B, C, N, and O. Integrated yields of $\gtrsim 3\times {10}^{-6\mathrm{}}$ and kinetic energies of 1.5-2.5 MeV/amu are indicated for fragments of oxygen or heavier nuclei.