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Measurement of the 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 half-life of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Nd</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>150</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>and search for neutrinoless decay modes with the NEMO-3 detector
The half-life for double-$\ensuremath{\beta}$ decay of $^{150}\mathrm{Nd}$ has been measured by the NEMO-3 experiment at the Modane Underground Laboratory. Using 924.7 days of data recorded with $36.55$ g of $^{150}\mathrm{Nd}$, we measured the half-life for $2\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ decay to be ${T}_{1/2}^{2\ensuremath{\nu}}=(9.{11}_{\ensuremath{-}0.22}^{+0.25}(\mathrm{stat}.)\ifmmode\pm\else\textpm\fi{}0.63(\mathrm{syst}.))\ifmmode\times\else\texttimes\fi{}{10}^{18}$ yr. The observed limit on the half-life for neutrinoless double-$\ensuremath{\beta}$ …