Upper Limit for Elastic Scattering of Electron Antineutrinos by Electrons

A conservative upper limit of 4 times the prediction of $V-A$ theory has been determined for the process ${\overline{\nu }}_e+e^{-}\to {\overline{\nu }}_e+e^{-}$. The target detector used in a fission ${\overline{\nu }}_e$ flux of 2.8×${10}^{13}$ ${\mathrm{cm}}^{-2\mathrm{}}$ ${\sec }^{-1\mathrm{}}$ was a 7.84-kg plastic scintillator arrangement enclosed by 330 kg of NaI and a 2200-liter liquid detector, the latter two operated in anticoincidence with the plastic.