Studying neutron-unbound states produced from a Na-30 beam
POSTER
Abstract
Invariant mass spectroscopy is a well-established technique used to recover information about neutron-unbound states that are not directly measurable, due to very short decay timescales on the order of 10$^{\mathrm{-21\thinspace }}$s. Measurements of these systems provide crucial benchmarks to help evaluate and improve theoretical models. In 2016, the MoNA Collaboration conducted a measurement of the O-26 half-life during which the Coupled Cyclotron Facility and the A1900 fragment separator at the NSCL supplied F-27, Ne-28, Ne-29, and Na-30 secondary beams produced via projectile fragmentation. These beams were subsequently directed onto a beryllium target. The main focus of the data set was given to the events in which one-proton knockout from F-27 populated neutron-unbound states in O-26. The goal of the current project is to extract the measured decay energy spectra for neutron-unbound states produced from the Na-30 beam and compare them to previous measurements while also searching for new unbound states with decay energies less than 3 MeV.
*This work was supported by the National Science Foundation, USA under Grants No. PHY-1102511, PHY-1565546, PHY-1613188, PHY-1713522, PHY-1613429, PHY-1713956. This work was also supported by the Department of Energy National Nuclear Security Administration, USA through the Nuclear Science and Security Consortium under Award No. DE-NA0003180.