We present the measurement of the two-neutrino double-fl decay rate of 76Ge performed with the GERDA Phase II experiment. With a subset of the entire GERDA exposure, 11.8 kg yr, the half-life of the process has been determined: T2 nu 1/2 1/4 o2.022 +/- 0.018stat +/- 0.038syst thorn x 1021 yr. This is the most precise determination of the 76Ge two-neutrino double-beta decay half-life and one of the most precise measurements of a double-beta decay process. The relevant nuclear matrix element can be extracted: M2 nu eff = (0.101 +/- 0.001).
Final Results of GERDA on the Two-Neutrino Double-β Decay Half-Life of 76Ge
Macolino, C;Salamida, F;
2023-01-01
Abstract
We present the measurement of the two-neutrino double-fl decay rate of 76Ge performed with the GERDA Phase II experiment. With a subset of the entire GERDA exposure, 11.8 kg yr, the half-life of the process has been determined: T2 nu 1/2 1/4 o2.022 +/- 0.018stat +/- 0.038syst thorn x 1021 yr. This is the most precise determination of the 76Ge two-neutrino double-beta decay half-life and one of the most precise measurements of a double-beta decay process. The relevant nuclear matrix element can be extracted: M2 nu eff = (0.101 +/- 0.001).File in questo prodotto:
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