Study of ${\hat{\mathbf{I}}}^2$ Decay Shape Factors in First-Forbidden Transitions with $\hat{\mathbf{I}}”{\mathbf{I}}^{\ddot{\mathbf{I}}}€=0^{-}$ for Reactor Antineutrino Spectra Predictions

G. A. Alcalá, A. Algora, M. Estienne +36

The electron spectra of the ${\hat{I}}^2$ decays of ${}^{92}$Rb and ${}^{142}$Cs, key contributors to the reactor antineutrino spectrum, were measured at the IGISOL facility using radioactive b…