Thin NaI(Tl) crystals to enhance the detection sensitivity for molten Am sources.

A thin 5-mm NaI(Tl) scintillator detector was tested with the goal of enhancing the detection efficiency of Am gamma and X rays for steelworks operations. The performance of a thin (5 mm) NaI(Tl) detector was compared with a standard 76.2-mm thick NaI(Tl) detector.

Design of a novel instrument for active neutron interrogation of artillery shells.

The most common explosives can be uniquely identified by measuring the elemental H/N ratio with a precision better than 10%. Monte Carlo simulations were used to design two variants of a new prompt gamma neutron activation instrument that can achieve this precision. The instrument features an intense pulsed neutron generator with precise timing.