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arXiv · 2408.16223

Gamow shell model description of neutron-rich He hyper-isotopes

Xin Li·N. Michel·J. G. Li·Xian-Rong Zhou
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Abstract

The Gamow shell model (GSM) framework has been extended to the study of weakly bound hypernuclei. As a first application, the neutron-rich He hyper-isotope chains, from 6{\Lambda}He to 9{\Lambda}He have been investigated to accurately account for the loosely bound or neutron-unbound character of hypernuclear many-body states. The energy spectra calculated with a phenomenological Hamiltonian show good agreement with experimental data. In particular, neutron-emitting resonant states are predicted for the neutron-rich nuclei 5-7He and the hypernucleus 6{\Lambda}He. Furthermore, one-neutron densities exhibit the long-range character of weakly bound and resonant states. This study demonstrates that GSM is a practical tool for describing the complex structure of hypernuclei, especially for those close to drip lines.

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Xin Li, N. Michel, J. G. Li, Xian-Rong Zhou. 2024-08-29. Gamow shell model description of neutron-rich He hyper-isotopes. https://arxiv.org/abs/2408.16223

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