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arXiv · 0904.1924

Investigation of $ββ$ decay in $^{150}$Nd and $^{148}$Nd to the excited states of daughter nuclei

A. S. Barabash·Ph. Hubert·A. Nachab·V. I. Umatov
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Abstract

Double beta decay of $^{150}$Nd and $^{148}$Nd to the excited states of daughter nuclei have been studied using a 400 cm$^3$ low-background HPGe detector and an external source consisting of 3046 g of natural Nd$_2$O$_3$ powder. The half-life for the two-neutrino double beta decay of $^{150}$Nd to the excited 0$^+_1$ state in $^{150}$Sm is measured to be $T_{1/2}=[1.33^{+0.36}_{-0.23}(stat)^{+0.27}_{-0.13}(syst)]\cdot 10^{20}$ y. For other $(0ν+ 2ν)$ transitions to the 2$^+_1$, 2$^+_2$, 2$^+_3$, and 0$^+_2$ levels in $^{150}$Sm, limits are obtained at the level of $\sim (2-8)\cdot 10^{20}$ y. In the case of $^{148}$Nd only limits for the $(0ν+ 2ν)$ transitions to the 2$^+_1$, 0$^+_1$, and 2$^+_2$ excited states in $^{148}$Sm were obtained and are at the level of \sim (4-8)\cdot 10^{20}$ y.

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A. S. Barabash, Ph. Hubert, A. Nachab, V. I. Umatov. 2009-04-13. Investigation of $ββ$ decay in $^{150}$Nd and $^{148}$Nd to the excited states of daughter nuclei. https://doi.org/10.1103/physrevc.79.045501

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