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Search for Periodic Modulations of the Rate of Double-Beta Decay of ¹⁰⁰Mo in the NEMO-3 Detector
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Search for Periodic Modulations of the Rate of Double-Beta Decay of ¹⁰⁰Mo in the NEMO-3 Detector
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Double-beta decays of $^{100}$Mo from the 6.0195-year exposure of a 6.914 kg high-purity sample were recorded by the NEMO-3 experiment that searched for neutrinoless double-beta decays. These ultra-rare transitions to $^{100}$Ru have a half-life of approximately $7\times10^{18}$ years, and have been used to conduct the first ever search for periodic variations of this decay mode. The Lomb-Scargle periodogram technique, and its error-weighted extension, were employed to look for periodic modulations of the half-life. Monte Carlo modeling was used to study the modulation sensitivity of the data over a broad range of amplitudes and frequencies. Data show no evidence of modulations with amplitude greater than 2.5% in the frequency range of $0.33225\,{\rm y^{-1}}$ to $365.25\,{\rm y^{-1}}$.
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Cited by 1 Pith paper
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Sensitivity of neutrinoless double beta decays from a combined analysis of ground and excited states
Combined analysis of 0νββ decays to ground and excited states can significantly enhance experimental sensitivity depending on NME predictions.
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