1. A single volume fission energy neutron detection system, the system comprising: a scintillator block; a photodetector, wherein the photodetector is located adjacent to the scintillator block, the photodetector comprises: detection bins; and a readout circuit that reads respective values from the position bins; and a computing system that is configured to estimate kinematics of a neutron that has interacted with scintillating material of the scintillator block at least twice, the computing system estimates the kinematics of the neutron based upon the respective values from the detection bins read out by the readout circuit, the kinematics of the neutron indicative of: a type of material of a target from which the neutron was emitted; and a location of the target relative to the scintillator block.