Field deployable neutron/gamma spectrometer

A kit of parts for detecting neutrons and gamma rays comprising:

• two or more portable cases;
• a plurality of plates, having at least a first plate and a second plate, wherein the first plate and the second plate each carry a plurality of scintillation detectors, the first plate comprising pulse-shape discriminating detectors and the second plate comprising non-pulse shape discriminating detectors, which plates are parallel to each other and configured in a stacked arrangement;
• at least one camera;
• an electronic and processing unit;
• and
• a remote computer, the remote computer comprising a display panel for displaying detection results.

A method of imaging and measuring neutrons and gamma rays comprising:

• providing an electronic and processing unit;
• providing a plurality of scintillation detectors of uniform length and width that are distributed in a matrix, the plurality of plates being held within two or more portable, field deployable cases, wherein the detectors are electronically connected to the electronic and processing unit, wherein the plurality of scintillation detectors comprise non-PSD organic scintillators, inorganic scintillators and scintillators that possess PSD properties;
• detecting a particle by its interaction with the non-PSD organic scintillators;
• measuring the time of flight of the particle from the non-PSD scintillators to the scintillators that possess PSD properties;
• determining details regarding the particle based on interaction of the particle with the scintillators that possess PSD properties, including a pulse shape measurement generated by pulse-shape-discrimination (PSD) property of the scintillators;
• detecting the particle by its interaction with the inorganic scintillators;
• and
• analyzing data to determine if the particle is a neutron or a gamma ray.