Double beta decay of ${}^{150}$Nd to the first excited $0^{+}$ level of ${}^{150}$Sm: preliminary results

Abstract

The double beta decay of ${}^{150}$Nd to the first excited 0${}^{+}$ level of ${}^{150}$Sm ($E_{exc}$ = 740.5 keV) has been investigated with the help of the ultra-low-background setup consisting of four HP Ge (high-purity germanium) detectors ($\approx$ 225 cm${}^3$ volume each one) at the Gran Sasso underground laboratory of INFN (Italy). A highly purified 2.381-kg sample of neodymium oxide (Nd${}_2$O${}_3$) was used as a source of $\gamma$ quanta expected in the decays. Gamma quanta with energies 334.0 keV and 406.5 keV emitted after deexcitation of the $0_1^{+}$ 740.5 keV level of ${}^{150}$Sm are observed in the coincidence spectra accumulated over 16375 h. The half-life relatively to the two neutrino double beta decay ${}^{150}$Nd $\to$ ${}^{150}$Sm(0${}_1^{+}$) is measured as $T_{1/2}=[4.7_{-1.9}^{+4.1}\text{(stat)}\pm 0.5\text{(syst)}]\times 10^{19}y$, in agreement with results of previous experiments.

arXiv comment13 pages, 7 figures and 2 tables

References in corpus (11)

• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Neutrinoless double beta decay: 2015 review
• Neutrinoless Double Beta Decay and Physics Beyond the Standard Model
• Neutrinoless double beta decay and neutrino physics
• Neutrinoless double beta decay and neutrino mass
• Limits on the neutrino mass from neutrinoless double-$\beta$ decay
• Neutrinoless Double-Beta Decay: a Probe of Physics Beyond the Standard Model
• Average and recommended half-life values for two neutrino double beta decay
• Double Beta Decays of Mo-100 and Nd-150
• Investigation of $\beta \beta$ decay in ${}^{150}$Nd and ${}^{148}$Nd to the excited states of daughter nuclei
• Two-neutrino double-beta decay of ${}^{150}$Nd to excited final states in ${}^{150}$Sm

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