Abstract
Resonance structure of the beta decay strength function Sβ(E) for GT β–-decay of halo nuclei 6He and 11Li is analyzed. Compare experimental total strength for β-transitions in \({{g_{V}^{2}} \mathord{\left/ {\vphantom {{g_{V}^{2}} {4\pi }}} \right. \kern-0em} {4\pi }}\) units with the Ikeda sum rule (in \({{{{{\left( {g_{A}^{{{\text{eff}}}}} \right)}}^{2}}} \mathord{\left/ {\vphantom {{{{{\left( {g_{A}^{{{\text{eff}}}}} \right)}}^{2}}} {4\pi }}} \right. \kern-0em} {4\pi }}\) units) one can determine the squared ratio of axial-vector and vector weak interaction constants value \({{\left( {{{g_{A}^{{{\text{eff}}}}} \mathord{\left/ {\vphantom {{g_{A}^{{{\text{eff}}}}} {{{g}_{V}}}}} \right. \kern-0em} {{{g}_{V}}}}} \right)}^{2}}\). We obtained \({{\left( {{{g_{A}^{{{\text{eff}}}}} \mathord{\left/ {\vphantom {{g_{A}^{{{\text{eff}}}}} {{{g}_{V}}}}} \right. \kern-0em} {{{g}_{V}}}}} \right)}^{2}}\) = 1.272 ± 0.010 for 6He and \({{\left( {{{g_{A}^{{{\text{eff}}}}} \mathord{\left/ {\vphantom {{g_{A}^{{{\text{eff}}}}} {{{g}_{V}}}}} \right. \kern-0em} {{{g}_{V}}}}} \right)}^{2}}\) = 1.5 ± 0.2 for 11Li β–-decays. Quenching of the weak axial-vector constant \(g_{A}^{{{\text{eff}}}}\) in halo nuclei is discussed.
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Izosimov, I.N. Quenching of Axial-Vector Weak Interaction Constant in Halo Nuclei. Phys. Part. Nuclei Lett. 16, 754–760 (2019). https://doi.org/10.1134/S1547477119060207
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DOI: https://doi.org/10.1134/S1547477119060207