Competition Between Particle-Hole and Particle-Particle Correlations in Forbidden Electron Capture: the Case of ${}^{123}$Te

M. Bianchetti, M. R. Quaglia, G. Colo` +3

The K-electron capture half-life of ${}^{123}$Te has been recently measured to be $t_{exp}^K=2.4\times 10^{19}$ yr, and constitutes the longest half-life ever measured in a single $β…