Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session 3WEB: Multi-neutron Systems IIInvited Workshop
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Chair: Thomas Redpath, Virginia State University Room: Hilton Waikoloa Village Queens 4 |
Monday, November 27, 2023 11:00AM - 11:30AM |
3WEB.00001: Multi-neutron experiments with MoNA-LISA Invited Speaker: Anthony N Kuchera The Modular Neutron Array and Large multi-Institutional Scintillator Array (MoNA-LISA) were primarily used for measurements of neutron-unbound states using invariant mass spectroscopy at the former National Superconducting Cyclotron Laboratory and are now at the Facility for Rare Isotope Beams. Making measurements of neutron-unbound states near or beyond the neutron dripline opens the possibility of decays of nuclei by more than one neutron. Such processes allow for studies of nuclear structure and decay dynamics through the correlations between the neutrons and daughter nuclei. Key examples studied by MoNA-LISA previously include 26O and 16Be. Careful analysis is performed to reduce the effects of single neutron scattering events that produce multiple hits in the array, in order to distinguish them from true multi-neutron events. Examples of recent and on-going MoNA-LISA experiments as well as the techniques to select multi-neutron emission events will be discussed. |
Monday, November 27, 2023 11:30AM - 12:00PM |
3WEB.00002: Experimental results on 3n and the near-future experiments on multi-neutron states at RIBF Invited Speaker: Kenjiro Miki Studies of multineutron systems have been interesting and fascinating topics in recent nuclear physics. The findings of the 4n peaks in the 4He(8He,8Be)4n and 8He(p,pα)4n reactions sparked hot debates from both theoretical and experimental perspectives. However, thus far, a comprehensive explanation for the origin of these peaks has not been obtained. In this presentation, we will present two of new experimental approaches on multineutron systems recently performed and planned at RIBF. |
Monday, November 27, 2023 12:00PM - 12:30PM |
3WEB.00003: Perspectives on the theory of tri-neutron and tetra-neutron systems Invited Speaker: James P Vary Theoretical efforts to investigate tri-neutron (3n) and tetra-neutron (4n) structures range from ab initio to phenomenological. I will review these approaches and their results along with their quantified uncertainties, where available, with a particular emphasis on ab initio approaches. Key issues include, but are not limited to, the limits of the underlying assumptions made (methods, inter-nucleon interactions) and the estimated convergence of theoretical calculations. I will also present some speculations on 4n structures at excitation energies above the recently reported experimental 4n structure. |
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