Search for Perturbations of Nuclear Decay Rates Induced by Reactor Electron Antineutrinos

Abstract

We report the results of an experiment conducted near the High Flux Isotope Reactor of Oak Ridge National Laboratory, designed to address the question of whether a flux of reactor-generated electron antineutrinos can alter the rates of weak nuclear interaction-induced decays for Mn-54, Na-22, and Co-60. This experiment, while quite sensitive, cannot exclude perturbations less than one or two parts in $10^4$ in ${\hat{I}}^2$ decay (or electron capture) processes, in the presence of an antineutrino flux of $3\times 10^{12}$ cm${}^{-2}$ s${}^{-1}$. The present experimental methods are applicable to a wide range of isotopes. Improved sensitivity in future experiments may be possible if we can understand and reduce the dominant systematic uncertainties.