Speaker
Description
An efficient neutron detection system with good energy resolution is
needed to characterize decays of neutron-rich nuclei where beta-delayed
neutron emission is a dominant decay mode. Precision neutron
spectroscopy probes nuclear structure effects in neutron-rich nuclei and
is essential to exploit the opportunities in new generation radioactive
beam facilities. A new high-resolution neutron detector, Neutron
dEtector with Xn Tracking(NEXT) has been constructed, characterized,
and tested in decay and reaction experiments. Its essential capability
is the interaction position localization, which enables improvement in
energy resolution without compromising detection efficiency in the
neutron time-of-flight measurement. First measurements were performed
with beta-delayed neutron emitters using NEXT at Argonne National
Laboratory(ANL), focussing on fission fragments.
At National Superconducting Cyclotron Laboratory(NSCL), NEXT was used
alongside the VANDLE array to study light drip-line nuclei at and below
the island of inversion with first-ever neutron spectroscopy performed
for several isotopes. The results from beta-delayed neutron emission
measurements for Nitrogen and Oxygen isotopes near the neutron drip line
will be presented.
