Abstract: A method of obtaining neutron tomography images of a workpiece (201), by means of a neutron source (101) and a plurality of neutron detectors (107), where the neutron source is an isotopic source containing less than one gram of radioactive isotope(s); the workpiece is up to 300×300×300 mm in size; and measurements to generate at least one tomography image of a workpiece take one hour or less to obtain.

Abstract: Disclosed are systems and methods for detecting fissile material. The systems and methods include devices and operations for measuring background neutron detection events using a plurality of fast neutron detectors arranged around a stimulation neutron source, measuring sample neutron detection events using the plurality of fast neutron detectors arranged around a small volume of sample material, measuring stimulated neutron detection events using the plurality of fast neutron detectors when the sample material is irradiated by the stimulation neutron source, (which in various implementations, includes determining a number of single neutron detection events), and determining a presence of fissile material in the sample material based upon the background neutron detection events, sample neutron detection events and the stimulated neutron detection events.

Abstract: Embodiments of the present invention provide an apparatus for radiation analysis, comprising a pulse discrimination module arranged to receive a signal corresponding to a pulse output by a scintillator and to determine a discrimination value indicative of one or more characteristics of the pulse, and a radiation type determination module for determining a type of radiation responsible for the pulse according to the discrimination value.

Abstract: Embodiments of the present invention provide an apparatus for radiation analysis, comprising a pulse discrimination module arranged to receive a signal corresponding to a pulse output by a scintillator and to determine a discrimination value indicative of one or more characteristics of the pulse, and a radiation type determination module for determining a type of radiation responsible for the pulse according to the discrimination value.