RIBF Nuclear Physics Seminar

A four-neutron system probed via alpha knockout reaction from 8He

by Meytal Duer (TU Darmstadt)

Asia/Tokyo
Description

=Date and Place=

July 26th (Tue) 2022  , 16:00~ via ZOOM meeting system

=Lecturer=

Dr. Meytal Duer

=Title=

A four-neutron system probed via alpha knockout reaction from 8He

=Abstract=

Whether multi-neutron systems can exist as weakly bound states or very short-lived unbound resonant states has been a long-standing quest. The discovery of such a system would have farreaching

implications for many aspects of nuclear physics, from the nature of the force itself up to the way it builds nuclei, and also for the modeling of neutron stars. The experimental search for isolated multi-neutron systems has been going for six decades, with a particular focus on the fourneutron system, the tetra-neutron, resulting in up to date only few indications for its existence, leaving it an elusive nuclear system. In this seminar I will present our very recent result, published in Nature[1], from an experiment performed at the SAMURAI experimental setup. Using a new experimental approach based on a knockout reaction of an alpha particle at large momentum transfer from radioactive high-energy 8He beam we were able to investigate the four-neutron system. [1] M. Duer et al., Nature 606, 678 (2022)