Neutrinoless double-
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 decay in the nucleon-pair shell model

Xue, Hui; Zhou, Xian-Rong; Zhang, S. Y.; He, B. C.; Yan, Luo; Li, Luyu; Pan, Feng; Draayer, J. P.

doi:10.1103/physrevc.105.014304

Cited by 2 publications

(1 citation statement)

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“…The 2νββ process is of considerable importance for the study of neutrinos and is usually difficult to observe. It can only be observed when normal β decay is forbidden in energy or because of the large angular-momentum difference between parent and daughter nuclei [4][5][6]. All 2νββ processes occur in even-even nuclei with typical nuclear half-lives of 10 18 years or more orders of magnitude [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Shell-model Study of Two-neutrino Double-Beta Decay for Z = 40–50 Nuclei and their SSD Properties

Jia¹,

Li²,

Dong³

2023

Phys. Scr.

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In this paper, large-scheme shell-model calculations are carried out for two-neutrino double-beta decay of Z=40–50 nuclei (94Zr, 96Zr, 98Mo, 104Ru, 108Cd, and 116Cd). Within this region, only the half-lives of nuclei 96Zr and 116Cd are experimentally known. The calculated results agree well with experimental data and we predict the half-lives for the remaining four nuclei. Among them, 94Zr and 104Ru have relatively short half-lives of 4.57×1023 and 9.83×1023 years, respectively, together with large abundance, and are expected to be detected in the near future. By analyzing the convergence of nuclear matrix elements, special attention is paid to their single-state dominance (SSD) property. Here, a new SSD nucleus, i.e., 94Zr, is found, which is a supplement to the previous SSD nuclei list. keyword:two-neutrino double-beta decay, half-life, single-state dominance (SSD) property

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