Explosives can be detected by the neutron activation of nitrogen present
in the material. Conventionally, inorganic scintillators are used, but in
order to detect the characteristic 10.8MeV emission with any efficiency,
large volume detectors are required. Lead glass cherenkov detectors have
been constructed as an alternative to conventional inorganic scintillators.
Such detectors are more cost effective but have poor energy resolution.
The response of four lead glass detectors to different energy gammas and
mixed gamma-neutron fields is presented.