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Final results on $${}^\mathbf{82 }{\hbox {Se}}$$ double beta decay to the ground state of $${}^\mathbf{82 }{\hbox {Kr}}$$ from the NEMO-3 experiment
Using data from the NEMO-3 experiment, we have measured the two-neutrino double beta decay ( $$2\nu \beta \beta $$ ) half-life of $$^{82}$$ Se as $$T_{\smash {1/2}}^{2\nu } \!=\! \left[ 9.39 \pm 0.17\left( \text{ stat }\right) \pm 0.58\left( \text{ syst }\right) \right] \times 10^{19}$$ y under the single-state dominance hypothesis …