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.

Provided is a sample-analyzing system used for identifying a target sample from its measurement data obtained using a plurality of analyzing devices including at least one device selected from a fluorescent X-ray analyzer, atomic absorption photometer and inductively coupled plasma emission analyzer as well as at least one device selected from an infrared spectrophotometer and Raman spectrophotometer. The system includes: a storage section for holding measurement data obtained for each of the reference objects using the analyzing devices; a measurement data comparator for comparing, for each analyzing device, the measurement data of the target sample with those of the reference objects and for determining the degree of matching of the target sample with each reference object; an integrated degree-of-matching calculator for calculating an integrated degree of matching from the degrees of matching determined for the analyzing devices; and a comparison result output section for outputting information concerning a predetermined number of reference objects in descending order of the integrated degree of matching.

Provided is a sample-analyzing system used for identifying a target sample from its measurement data obtained using a plurality of analyzing devices including at least one device selected from a fluorescent X-ray analyzer, atomic absorption photometer and inductively coupled plasma emission analyzer as well as at least one device selected from an infrared spectrophotometer and Raman spectrophotometer. The system includes: a storage section for holding measurement data obtained for each of the reference objects using the analyzing devices; a measurement data comparator for comparing, for each analyzing device, the measurement data of the target sample with those of the reference objects and for determining the degree of matching of the target sample with each reference object; an integrated degree-of-matching calculator for calculating an integrated degree of matching from the degrees of matching determined for the analyzing devices; and a comparison result output section for outputting information concerning a predetermined number of reference objects in descending order of the integrated degree of matching.

The presence of chlorine and nitrogen are determined and measured using a non-invasive portable neutron-generating and gamma ray detecting system(s). Portable devices of the present invention can also be used to detect chlorine and/or nitrogen-containing underground objects rapidly and on-site. Devices and systems described herein can be operated remotely and pre-programmed with search patterns, guided by an operator remotely, or programmed to home in on high-chlorine and/or nitrogen concentration areas.

The presence of chlorine and nitrogen are determined and measured using a non-invasive portable neutron-generating and gamma ray detecting system(s). Portable devices of the present invention can also be used to detect chlorine and/or nitrogen-containing underground objects rapidly and on-site. Devices and systems described herein can be operated remotely and pre-programmed with search patterns, guided by an operator remotely, or programmed to home in on high-chlorine and/or nitrogen concentration areas.

Disclosed are systems and methods for detecting fissile material. The systems and methods include devices and operations for measuring background neutron detection events using a plurality of fast neutron detectors arranged around a stimulation neutron source, measuring sample neutron detection events using the plurality of fast neutron detectors arranged around a small volume of sample material, measuring stimulated neutron detection events using the plurality of fast neutron detectors when the sample material is irradiated by the stimulation neutron source, (which in various implementations, includes determining a number of single neutron detection events), and determining a presence of fissile material in the sample material based upon the background neutron detection events, sample neutron detection events and the stimulated neutron detection events.

The invention relates to a method and corresponding devices for monitoring the attention of an operator of an X-ray inspection system for nondestructive inspection of inspection objects and for ensuring the presence and/or attention of an operator of the X-ray inspection system including the following steps: display of a piece of information that defines a randomly determined desired input; detection of an actual input of the operator as a response to the displayed desired input; and, based on the desired input and the actual input, determination of a signal that indicates the attention of the operator.

This invention provides a scan method, scan system and radiation scan controller, and relates to the field of radiation. Wherein, the scan method of this invention comprises: obtaining detection data of an object to be inspected under radiation scanning using a detector; adjusting an accelerator output beam dose rate and/or an output electron beam energy level of a radiation emission device according to the detection data. With this method, working conditions of the accelerator of the radiation emission device may be adjusted according to the detection data detected by the detector, so that for a region having a larger mass thickness, a higher output beam dose rate or a higher electron beam output energy level is adopted to guarantee satisfied imaging technical indexes, for a region having a smaller mass thickness, a lower output beam dose rate or a lower electron beam output energy level is adopted to reduce the environmental dose level while guaranteeing satisfied imaging technical indexes.

Apparatus and methods for Compton scattering radiography employing a variable energy X-ray source and a detector capable of detecting the temporal intensity profile of scattered X-ray pulses disposed on one side of an object to be imaged. Based on analysis of the measurement of the instantaneous intensity of the detected photons and the beam position relative to the object, an image is generated. Each voxel can be reconstructed to yield a measure of variation in the density of the material of the object.

The present specification discloses a radiographic inspection system for screening an area. The inspection system has a container that defines an enclosed volume, a radiation source positioned within the enclosed volume, a detector array, a movable structure attached to a portion of the base of the container, and a controller programmed to move the movable structure to achieve an optimum height of the radiation source's field of view based upon a plurality of data.