Precise half-life values for two-neutrino double-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>β</mml:mi></mml:mrow></mml:math>decay
Precise half-life values for two-neutrino double-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>β</mml:mi></mml:mrow></mml:math>decay
All existing positive results on two-neutrino double-$\ensuremath{\beta}$ decay in different nuclei were analyzed. Using the procedure recommended by the Particle Data Group, weighted average values for half-lives of $^{48}\mathrm{Ca}$, $^{76}\mathrm{Ge}$, $^{82}\mathrm{Se}$, $^{96}\mathrm{Zr}$, $^{100}\mathrm{Mo}$, $^{100}\mathrm{Mo}$-$^{100}\mathrm{Ru}$ (${0}_{1}^{+}$), $^{116}\mathrm{Cd}$, $^{130}\mathrm{Te}$, $^{150}\mathrm{Nd}$, $^{150}\mathrm{Nd}$-$^{150}\mathrm{Sm}$ (${0}_{1}^{+}$), and $^{238}\mathrm{U}$ were obtained. Existing geochemical data were analyzed, and …