Speaker
Description
The FRIB Decay Station Initiator [All25] was designed for comprehensive decay studies, including the ability to perform beta-delayed neutron emission studies. The bn-precursors investigated so far with FDSi range from doubly magic 24O to deformed 111Nb. The analysis of three cases was recently completed at the University of Tennessee. The measurement of 24O reveals the role of continuum coupling in neutron emission [Neu26] by directly measuring the widths of nuclear resonances populated in beta decay. The decay of deformed 44S revealed an unexpected suppression of the L=0 neutron emission channel, and we are investigating the nature of this process using microscopic models [Bra26]. Finally, the decay of 54K to doubly magic 54Ca demonstrated a role of two-body currents [Gys18] in very neutron-rich nuclei [Xu26]. These experimental results show that beta-delayed neutron emission is an effective tool for studying very neutron-rich nuclei and provide new insights into these exotic nuclei.
This research was sponsored by the U.S. Department of
Energy, Office of Science, Office of Nuclear Physics under DE-FG02-96ER40983, and by the Stewardship Science Academic Alliances program through DOE Award No. DE-NA0003899.
[All25] J.M. Allmond and R. Grzywacz, Nuclear Physics News 35, 24 (2025).
[Bra26] N. Braukman et al. to be submitted
[Gys18] P. Gysbers et al., Nature Physics 15, 428 (2019)
[Neu26] S. Neupane et al. submitted
[Xu26] Z. Xu et al. submitted