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- W2890349111 abstract "We study the two-neutrino double electron capture on $^{124}$Xe based on an effective theory (ET) and large-scale shell model calculations, two modern nuclear structure approaches that have been tested against Gamow-Teller and double-beta decay data. In the ET, the low-energy constants are fit to electron capture and $beta^{-}$ transitions around xenon. For the nuclear shell model, we use an interaction in a large configuration space that reproduces the spectroscopy of nuclei in this mass region. For the dominant transition to the $^{124}$Te ground state, we find half-lives $T^{2nu{rm ECEC}}_{1/2}=(1.3-18)times 10^{22}$ y for the ET and $T^{2nu{rm ECEC}}_{1/2} = (0.43-2.9)times 10^{22}$ y for the shell model. The ET uncertainty leads to a half-life almost entirely consistent with present experimental limits and largely within the reach of ongoing experiments. The shell model half-life range overlaps with the ET, but extends less beyond current limits. Our findings thus suggest that the two-neutrino double electron capture on $^{124}$Xe has a good chance to be discovered by ongoing or future experiments. In addition, we present results for the two-neutrino double electron capture to excited states of $^{124}$Te." @default.
- W2890349111 created "2018-09-27" @default.
- W2890349111 creator A5014405344 @default.
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- W2890349111 date "2019-10-01" @default.
- W2890349111 modified "2023-10-03" @default.
- W2890349111 title "Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model" @default.
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- W2890349111 doi "https://doi.org/10.1016/j.physletb.2019.134885" @default.
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