Abstract
The neutron decay of an unbound resonance in has been measured at keV decay energy with a width of keV. This state was populated with a one-proton removal reaction from a 71 MeV/u beam incident upon a beryllium target. The invariant mass reconstruction of the resonance was achieved by measuring the daughter fragment in coincidence with neutrons. Despite being above the separation energy, the state decays predominantly by the emission of one neutron to , setting an upper limit on the branching ratio for the two-neutron decay channel to of less than 5%. From the characteristics of the population and decay of the resonance, it is concluded that this state cannot correspond to the previously observed state at keV.
4 More- Received 10 April 2014
- Revised 27 June 2014
DOI:https://doi.org/10.1103/PhysRevC.90.024309
©2014 American Physical Society