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.

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.

An optoelectronic neutron detector and method for detecting nuclear material having a neutron capture and scatter medium receiving neutrons and producing secondary charged particles, a photodetector detecting emitted light from the secondary charged particles and outputting a detector signal, and a controller receiving the detector signal and providing an alert or quantitative indication of detected nuclear material in response to the detector signal.

An optoelectronic neutron detector and method for detecting nuclear material having a neutron capture and scatter medium receiving neutrons and producing secondary charged particles, a photodetector detecting emitted light from the secondary charged particles and outputting a detector signal, and a controller receiving the detector signal and providing an alert or quantitative indication of detected nuclear material in response to the detector signal.

A semiconductor photomultiplier (SPM) device is described. The SPM comprises a plurality of photosensitive elements, a first electrode arranged to provide a bias voltage to the photosensitive elements, a second electrode arranged as a biasing electrode for the photosensitive elements, a plurality of quench resistive elements each associated with a corresponding photosensitive element, a plurality of output loads each having a capacitive load operably coupled to a resisitive load in a parallel configuration between first and second nodes; each first node is common to one of the photosensitive elements and the corresponding quench element; and a third electrode coupled to the second nodes of the output loads to provide an output signal from the photosensitive elements. The outputs loads fully or partially correct an overshoot of an output signal on the third electrode.

A semiconductor photomultiplier (SPM) device is described. The SPM comprises a plurality of photosensitive elements, a first electrode arranged to provide a bias voltage to the photosensitive elements, a second electrode arranged as a biasing electrode for the photosensitive elements, a plurality of quench resistive elements each associated with a corresponding photosensitive element, a plurality of output loads each having a capacitive load operably coupled to a resisitive load in a parallel configuration between first and second nodes; each first node is common to one of the photosensitive elements and the corresponding quench element; and a third electrode coupled to the second nodes of the output loads to provide an output signal from the photosensitive elements. The outputs loads fully or partially correct an overshoot of an output signal on the third electrode.

An apparatus for neutron detection is provided. The apparatus comprises a sensor medium in electrical contact with an electrode arrangement conformed to collect radiation-generated charge from the sensor medium. The sensor medium comprises a borazine and/or a borazine-based polymer.

Gas-filled neutron detectors, an imaging system and an array of such detectors are provided. Surfaces or surface portions incorporated into the gas-filled neutron detectors are coated with and/or composed of at least partially, neutron reactive material. The surfaces may be flat or curved, fins or plates, foils, thin sheets, porous or filamentary material, or semi-solid material or aerogel. The incorporation of the extended surfaces coated with or composed of neutron reactive material increases the neutron detection efficiency of the gas-filled detectors. The surfaces can be made of conductive, semiconductive, semi-insulating, or insulative materials. The surfaces are arranged such that they do not detrimentally detract from the main function of a gas-filled detector with particular attention to gas-filled proportional detectors. The surfaces may be arranged in the detectors to allow for modular construction. The surfaces are designed and arranged such that more than a single reaction product may escape the surface.

A radiation detector includes a block of a material capable of interacting with ionizing radiation to produce charge carriers, an inductor positioned adjacent to the block and having an inductance that depends on a number of the charge carriers in the block, and a sensing circuit coupled to sense a change in the inductance and detect the ionizing radiation base on the change. The sensing circuit may particularly contain an RF synthesizer that drives the inductance, e.g., an LC circuit containing the inductance, and an analyzer that detects changes in the response of the inductance.

A radiation detector includes a block of a material capable of interacting with ionizing radiation to produce charge carriers, an inductor positioned adjacent to the block and having an inductance that depends on a number of the charge carriers in the block, and a sensing circuit coupled to sense a change in the inductance and detect the ionizing radiation base on the change. The sensing circuit may particularly contain an RF synthesizer that drives the inductance, e.g., an LC circuit containing the inductance, and an analyzer that detects changes in the response of the inductance.