Patent application number | Description | Published |
20090140150 | INTEGRATED NEUTRON-GAMMA RADIATION DETECTOR WITH ADAPTIVELY SELECTED GAMMA THRESHOLD - An integrated radiation detector having a pulse-mode operating photosensor optically coupled to a gamma sensing element and a neutron sensing element is disclosed. The detector includes pulse shape and processing electronics package that uses an analog to digital converter (ADC) and a charge to digital converter (QDC) to determine scintillation decay times and classify radiation interactions by radiation type. The pulse shape and processing electronics package determines a maximum gamma energy from the spectrum associated with gamma rays detected by the gamma sensing element to adaptively select a gamma threshold for the neutron sensing element. A light pulse attributed to the neutron sensing element is a valid neutron event when the amplitude of the light pulse is above the gamma threshold. | 06-04-2009 |
20090140158 | MOLDABLE NEUTRON SENSITIVE COMPOSITIONS, ARTICLES, AND METHODS - Moldable neutron sensitive compositions containing an inorganic scintillating component, and neutron capture component, and a moldable resin component, are described. They are prepared with optimized compositions for maximized thermal neutron sensitivity. Methods for preparing such compositions, and articles and radiation detectors made from them are described as well. | 06-04-2009 |
20090200480 | INTEGRATED NEUTRON-GAMMA RADIATION DETECTOR WITH OPTICAL WAVEGUIDE AND NEUTRON SCINTILLATING MATERIAL - An integrated neutron-gamma radiation detector includes a gamma sensing element, a neutron sensing element comprising a neutron scintillating material at least partially surrounded by an optical waveguide material, and a photosensing element optically coupled to both the gamma sensing element and the neutron sensing element. A portion of the gamma sensing element is capable of being disposed within a central aperture of the neutron sensing element. In one aspect, the neutron sensing element comprises a plurality of cylindrical, concentric shells forming the central aperture for receiving the gamma sensing element. In another aspect, the neutron sensing element comprises a plurality of strands forming a multi-layered structure and forming the central aperture for receiving the gamma sensing element. | 08-13-2009 |
20100065791 | SEMICONDUCTOR MATERIAL FOR RADIATION ABSORPTION AND DETECTION - A semiconductor material for radiation absorption and detection comprising a composition of stoichiometry Li(M | 03-18-2010 |
20100230603 | INTEGRATED NEUTRON-GAMMA RADIATION DETECTOR WITH OPTICAL WAVEGUIDE AND NEUTRON SCINTILLATING MATERIAL - A radiation detector includes a neutron sensing element having a neutron scintillating material at least partially surrounded by an optical waveguide material; and a photosensing element optically coupled to the neutron sensing element. The photons emitted from the neutron sensing element are collected and channeled through the optical waveguide material and into the photosensing element. | 09-16-2010 |
20100276602 | RADIATION DETECTOR WITH OPTICAL WAVEGUIDE AND NEUTRON SCINTILLATING MATERIAL - A radiation detector includes a neutron sensing element comprising a neutron scintillating composite material that emits a first photon having a first wavelength and an optical waveguide material having a wavelength-shifting dopant dispersed therein that absorbs the first photon emitted by the neutron scintillating composite material and emits a second photon having a second, different wavelength, and a functionalized reflective layer at an interface between the neutron scintillating composite material and the optical waveguide material. The functionalized reflective layer allows the first photon emitted by the neutron scintillating composite material to pass through and into the optical waveguide material, but prevents the second photon emitted by the optical waveguide material from passing through and into the neutron scintillating composite material. The photons emitted from the neutron sensing element are collected and channeled through the optical waveguide material and into a photosensing element optically coupled to the neutron sensing element. | 11-04-2010 |
20100327170 | SPECTROSCOPIC FAST NEUTRON DETECTION AND DISCRIMINATING USING LI-BASED SEMICONDUCTORS - A neutron sensing material detector includes an anode; a cathode; and a semiconductor material disposed between the anode and the cathode. An electric field is applied between the anode and cathode. The semiconductor material is composed of a ternary composition of stoichiometry LiM | 12-30-2010 |
20110089332 | NEUTRON DETECTION SYSTEM - A neutron detection system comprising a radiation portal monitor is disclosed. The radiation portal monitor includes a neutron moderator sheet and a neutron-sensing panel and is configured to receive incoming neutrons through a neutron collection portal area. The neutron-sensing panel comprises a neutron-sensing material optically coupled to a plurality of optical fibers such that the neutron moderator sheet and the neutron-sensing panel are disposed substantially parallel to the neutron collection portal area. | 04-21-2011 |
20120112074 | NEUTRON SCINTILLATOR COMPOSITE MATERIAL AND METHOD OF MAKING SAME - A neutron scintillator composite (NSC) material is made of a neutron scintillator material and a binder material. The binder material has an index of refraction substantially identical to the neutron scintillator material. The neutron scintillator material and binder material are mixed into a solid or semi-solid neutron scintillator composite material with sufficient flowability for molding into a shaped article, such as a neutron sensing element of a radiation detector. The neutron scitillator composite material collects and channels photons through the material itself and into a photosensing element optically coupled to the material. Because the indices of refraction for both the neutron scintillator material and the binder material are substantially identical, scattering at the scintillator-binder interface(s) is minimized, thereby producing transmission efficiencies that approach single crystals. | 05-10-2012 |
20130193329 | LITHIUM BASED SCINTILLATORS FOR NEUTRON DETECTION - A neutron scintillator composite (NSC) is made of a neutron scintillator and a binder. The neutron scintillator of the composite has the formula Li | 08-01-2013 |