We present a measurement of the electron-capture branch of $^{100}$Tc. Our value, $B(text{EC}) = (2.6 pm 0.4) times 10^{-5}$, implies that the $^{100}$Mo neutrino absorption cross section to the ground state of $^{100}$Tc is roughly one third larger than previously thought. Compared to previous measurements, our value of $B(text{EC})$ prevents a smaller disagreement with QRPA calculations relevant to double-$beta$ decay matrix elements.
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