A single volume fission energy neutron detector is described herein. The detector includes a single volume of scintillator. A photodetector is positioned adjacent to a surface of the scintillator, wherein the photodetector has relatively small spatial resolution corresponding thereto and relatively small temporal resolution corresponding thereto. Based upon values read out from detection bins of the photodetector, kinematics of a neutron that interacted with scintillating material of the scintillator are reconstructed. Based upon the kinematics (of the neutron and other detected neutrons), a location of material from which the neutron was emitted is ascertained, and an image of the material is generated.

A single volume fission energy neutron detector is described herein. The detector includes a single volume of scintillator. A photodetector is positioned adjacent to a surface of the scintillator, wherein the photodetector has relatively small spatial resolution corresponding thereto and relatively small temporal resolution corresponding thereto. Based upon values read out from detection bins of the photodetector, kinematics of a neutron that interacted with scintillating material of the scintillator are reconstructed. Based upon the kinematics (of the neutron and other detected neutrons), a location of material from which the neutron was emitted is ascertained, and an image of the material is generated.

A spectroscopic gamma and neutron detecting device includes a scintillation detector that detects gamma and thermal neutron radiation, the scintillation detector including signal detection and amplification electronics, and a stabilization module configured to measure a pulse height spectrum of neutron radiation, determine a thermal neutron peak position in the neutron pulse height spectrum originating from cosmic ray background radiation, monitor the thermal neutron peak position in the neutron pulse height spectrum during operation of the spectroscopic gamma and neutron detecting device, and adjust the signal detection and amplification electronics based on the thermal neutron peak position in the neutron pulse height spectrum, thereby stabilizing the spectroscopic gamma and neutron detecting device.

A thermal neutron detecting device comprises a scintillator unit, and an optical sensor array unit. The scintillator unit includes a scintillator layer and a nuclear capture reaction layer. The scintillator layer emits light upon receiving incident gamma ray or charged particles. The nuclear capture reaction layer is laminated on a side of the scintillator layer on which the gamma ray or the charged particles are incident, and includes first cell regions and second cell regions two-dimensionally, dispersedly arranged along an incidence plane of the gamma ray or the charged particles. The first cell regions contain a .sup.6Li compound as a nuclear capture reaction material that yields nuclear capture reaction with incident thermal neutrons to generate the charged particles. The second cell regions contain no nuclear capture reaction material. The optical sensor array unit is capable of detectable of a quantity of the emitted light in association with each of the first and second cell regions.

A thermal neutron detecting device comprises a scintillator unit, and an optical sensor array unit. The scintillator unit includes a scintillator layer and a nuclear capture reaction layer. The scintillator layer emits light upon receiving incident gamma ray or charged particles. The nuclear capture reaction layer is laminated on a side of the scintillator layer on which the gamma ray or the charged particles are incident, and includes first cell regions and second cell regions two-dimensionally, dispersedly arranged along an incidence plane of the gamma ray or the charged particles. The first cell regions contain a .sup.6Li compound as a nuclear capture reaction material that yields nuclear capture reaction with incident thermal neutrons to generate the charged particles. The second cell regions contain no nuclear capture reaction material. The optical sensor array unit is capable of detectable of a quantity of the emitted light in association with each of the first and second cell regions.

Composite materials that include a phosphor and boron nitride particles. The composite materials may be scintillating materials. The boron nitride particles may be .sup.10B enriched particles. Systems that include composite materials and a detector. Methods of detecting or blocking neutrons. Methods of manufacturing composite materials, including large-area composite materials.

Composite materials that include a phosphor and boron nitride particles. The composite materials may be scintillating materials. The boron nitride particles may be .sup.10B enriched particles. Systems that include composite materials and a detector. Methods of detecting or blocking neutrons. Methods of manufacturing composite materials, including large-area composite materials.

A radiation monitor includes a radiation detection unit detecting radiation, and an optical fiber transmitting photons emitted from a light emitting element of the radiation detection unit, wherein the radiation detection unit includes a first light emitting element generating a photon in response to incident radiation, a chemical compound part having chemical compounds which generate charged particles by nuclear reactions with incident neutrons, and a second light emitting element being located between the first light emitting element and the chemical compound part and generating a photon in response to radiation.

A radiation monitor includes a radiation detection unit detecting radiation, and an optical fiber transmitting photons emitted from a light emitting element of the radiation detection unit, wherein the radiation detection unit includes a first light emitting element generating a photon in response to incident radiation, a chemical compound part having chemical compounds which generate charged particles by nuclear reactions with incident neutrons, and a second light emitting element being located between the first light emitting element and the chemical compound part and generating a photon in response to radiation.

A radiation detector is provided. The radiation detector includes an outer casing, at least one first detector disposed within said outer casing, the at least one first detector configured to primarily detect gamma ray radiation, at least one second detector disposed within the outer casing, the at least one second detector configured to primarily detect neutron radiation, and a computing device disposed within the outer casing and communicatively coupled to the at least one first detector and the at least one second detector. The computing device is configured to receive first data from the at least one first detector, receive second data from the at least one second detector, determine a number of neutrons and gamma rays detected based on the first and second data, and determine a detected energy spectrum based on the first and second data.