Neutron correlations and clustering in neutron-rich nuclear systems
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| Format: | Preprint |
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2025
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| author | Yang, Zaihong Kubota, Yuki |
| author_facet | Yang, Zaihong Kubota, Yuki |
| contents | In this paper, we will briefly review the recent progress on neutron correlations and clustering in neutron-rich nuclei from quasi-free scattering experiments. The quasi-free ($p$, $pn$) reaction was measured for Borromean nuclei $^{11}$Li, $^{14}$Be, and $^{17}$B. A surprisingly small $s$-wave component was found for $^{17}$B, revealing a weak neutron halo in $^{17}$B, and the comparative study of the three nuclei shows the surface localization of dineutron correlation and its universality in Borromean nuclei. The two-neutron emission of $^{16}$Be was also studied, finding strong dineutron correlation in $^{16}$Be(g.s.) but weak correlation in $^{16}$Be($2^+$). Two missing-mass measurements using $^{4}$He($^{8}$He, $^{8}$Be) and $^{8}$He($p$, $pα$) reactions provided evidence for the $^{4}n$ resonance, but the $^{3}n$ resonance was not supported by the recent experiment employing the $t(t,^3$He)$^3n$ charge-exchange reaction. The quasi-free $(p,p α)$ reaction has been extended to unstable nuclei, and the recent experiment unravels the $α$-$2n$-$α$ molecule-like cluster structure of $^{10}$Be(g.s.). |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_12131 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Neutron correlations and clustering in neutron-rich nuclear systems Yang, Zaihong Kubota, Yuki Nuclear Experiment Nuclear Theory In this paper, we will briefly review the recent progress on neutron correlations and clustering in neutron-rich nuclei from quasi-free scattering experiments. The quasi-free ($p$, $pn$) reaction was measured for Borromean nuclei $^{11}$Li, $^{14}$Be, and $^{17}$B. A surprisingly small $s$-wave component was found for $^{17}$B, revealing a weak neutron halo in $^{17}$B, and the comparative study of the three nuclei shows the surface localization of dineutron correlation and its universality in Borromean nuclei. The two-neutron emission of $^{16}$Be was also studied, finding strong dineutron correlation in $^{16}$Be(g.s.) but weak correlation in $^{16}$Be($2^+$). Two missing-mass measurements using $^{4}$He($^{8}$He, $^{8}$Be) and $^{8}$He($p$, $pα$) reactions provided evidence for the $^{4}n$ resonance, but the $^{3}n$ resonance was not supported by the recent experiment employing the $t(t,^3$He)$^3n$ charge-exchange reaction. The quasi-free $(p,p α)$ reaction has been extended to unstable nuclei, and the recent experiment unravels the $α$-$2n$-$α$ molecule-like cluster structure of $^{10}$Be(g.s.). |
| title | Neutron correlations and clustering in neutron-rich nuclear systems |
| topic | Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2501.12131 |