Precise Half-Life Values for Two-Neutrino Double-β Decay: 2020 Review

Barabash, A. S.

doi:10.3390/universe6100159

Cited by 109 publications

(126 citation statements)

References 96 publications

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“…Double beta decay occurs when a nucleus spontaneously changes its atomic number by two units [1]. Despite the low probability for this process to happen, double beta decay has been already observed for 12 nuclei, with typical half-lives in the range of 10 18 -10 24 yr [2]. In recent times, some expera e-mail: cupid.publications@lngs.infn.it (corresponding author) b Also at Physik-Department, Technische Universität München, Garching, Germany imental techniques have reached such a high precision on the measurement of this process that today it is possible to infer important nuclear properties or even search for physics beyond the Standard Model of Particles and Fields (SM) by studying spectral distortions [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Armatol¹,

Armengaud²,

Armstrong³

et al. 2021

Eur. Phys. J. C

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The CUPID Collaboration is designing a tonne-scale, background-free detector to search for double beta decay with sufficient sensitivity to fully explore the parameter space corresponding to the inverted neutrino mass hierarchy scenario. One of the CUPID demonstrators, CUPID-Mo, has proved the potential of enriched Li$$_{2}$$ 2 $$^{100}$$ 100 MoO$$_4$$ 4 crystals as suitable detectors for neutrinoless double beta decay search. In this work, we characterised cubic crystals that, compared to the cylindrical crystals used by CUPID-Mo, are more appealing for the construction of tightly packed arrays. We measured an average energy resolution of ($$6.7\pm 0.6$$ 6.7 ± 0.6 ) keV FWHM in the region of interest, approaching the CUPID target of 5 keV FWHM. We assessed the identification of $$\alpha $$ α particles with and without a reflecting foil that enhances the scintillation light collection efficiency, proving that the baseline design of CUPID already ensures a complete suppression of this $$\alpha $$ α -induced background contribution. We also used the collected data to validate a Monte Carlo simulation modelling the light collection efficiency, which will enable further optimisations of the detector.

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Section: Introductionmentioning

confidence: 99%

Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Armatol¹,

Armengaud²,

Armstrong³

et al. 2021

Eur. Phys. J. C

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“…The collaboration quoted a signal due to the 2ν2 decay in 124 Xe with the half-life of (1.8 ± 0.5 stat ± 0.1 sys ) × 10 22 yr [171]. However, the significance of the effect is only 4.4 σ, as addressed in the literature (see e.g., Reference [192]). To be thorough, it should also be noted that a limit T 1/2 ≥ 2.1 × 10 22 yr was previously obtained in Reference [172] (see Table 1).…”

Section: Positive Claims For Some 2ν Dbd+ Modesmentioning

confidence: 99%

“…However, in a following geochemical experiment, a T 1/2 = (6.0 ± 1.1) × 10 20 yr [175] was obtained in disagreement with the previous results. More recently, in Reference [198], a summary of the previous measurements was attempted while considering a more reliable value of T 1/2 = (2.2 ± 0.5) × 10 21 yr, as recommended in Reference [192] (see Table 1).…”

Section: Positive Claims For Some 2ν Dbd+ Modesmentioning

confidence: 99%

Status and Perspectives of 2ϵ, ϵβ+ and 2β+ Decays

2021

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This paper reviews the main experimental techniques and the most significant results in the searches for the 2ϵ, ϵβ+ and 2β+ decay modes. Efforts related to the study of these decay modes are important, since they can potentially offer complementary information with respect to the cases of 2β− decays, which allow a better constraint of models for the nuclear structure calculations. Some positive results that have been claimed will be mentioned, and some new perspectives will be addressed shortly.

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“…In this section we only summarize the results of those isotopes more considered in the field. For the others isotopes we invite the reader to the bibliography [7,8,29,[44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59].…”

Section: Limits Achieved In the Search For Other ββ Decay To Excited Levelsmentioning

confidence: 99%

Double Beta Decay to Excited States of Daughter Nuclei

et al. 2020

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In this paper we review results obtained in the searches of double beta decays to excited states of the daughter nuclei and illustrate the related experimental techniques. In particular, we describe in some detail the only two cases in which the transition has been observed; that is the 2β−(0+→01+) decay of 100Mo and 150Nd nuclides. Moreover, the most significant results in terms of lower limits on the half-life are also summarized.

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Precise Half-Life Values for Two-Neutrino Double-β Decay: 2020 Review

Cited by 109 publications

References 96 publications

Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Status and Perspectives of 2ϵ, ϵβ+ and 2β+ Decays

Double Beta Decay to Excited States of Daughter Nuclei

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