  Potential applications of neutrino detection to nuclear security have been
discussed since the 1970s. Recent years have seen great progress in detector
technologies based on inverse beta decay, with the demonstration of ton-scale
surface-level detectors capable of high quality neutrino spectrum measurements.
At the same time coherent elastic neutrino nucleus scattering has been
experimentally confirmed in 2017 with neutrinos from stopped pion decay and
there is a number of experiments aimed at seeing this reaction with reactor
neutrinos. The large cross section and threshold-less nature of this reaction
make it plausible to consider it for applications to nuclear security and here,
we present a first direct comparison of the two reaction modes.
