Abstract: An electrical device that includes a substrate; a 3D capacitor including a capacitor dielectric region of a dielectric material, a capacitor electrode region of a conductive material, the capacitor dielectric region and the capacitor electrode region being arranged at least partially inside a cavity extending in the substrate from a top face of the substrate; and a surrounding through opening in the substrate and which surrounds a surrounded substrate region, the 3D capacitor being outside of the surrounded substrate region, the surrounding through opening extending from the top face to a bottom face of the substrate, wherein inside the surrounding through opening a surrounding dielectric region of the dielectric material and a surrounding conductive region of the conductive material are arranged.

Abstract: A method for determining the nature of the radioelements present in an object and their activity comprises at least the following steps: a first phase of numerical simulation of spectrometric responses for an incident-energy set E and a measured-output-energy set E?, so as to obtain a simulated-data set, a second phase of non-parametric regression on the simulated data, non-parametric estimation of the quantity representing the joint probability of the triplets (E,E?,y) on the basis of simulated points (Ei,Ei?,yij) so as to deduce therefrom a meta-model S(E, E?) for any energy pair (E, E?) on a continuous function, on the basis of the meta-model S(E, E?), the determination of the nature and activity of the radioelements present in the object.

Abstract: The invention relates to a scintillator for detecting neutrons and/or gamma photons, characterized in that it comprises a structure consisting of two undoped plastic materials for detecting neutrons and which contain different fluorescent complexes, a first plastic material containing at least one fluorescent complex able to produce a fluorescence light having a first relaxation time and the second plastic material containing at least one fluorescent complex able to produce a fluorescence light having a second relaxation time higher than the first relaxation time.

Abstract: A method for detecting a radioactive source moving on a linear path substantially parallel to an alignment of N detectors. The method includes: forming N×Nt pulse counting values Mi,t (i=1, 2, . . . , N and t=1, 2, . . . , Nt) from N×Nt detection signals delivered by the N detectors in the form of a succession over time of Nt sets of N signals simultaneously detected by the N detectors over a same duration ?t, a pulse counting value representing a number of pulses detected by a detector over a duration ?t; and computing, using a computer: a set of Nt correlation products Rt, a static mean R of the N×Nt counting values, a correlation condition for each correlation product Rt.

Abstract: A radiation detecting system, including: plastics scintillators juxtaposed to form at least one pair of contiguous plastics scintillators; a photomultiplier associated with each plastics scintillator to provide an electrical signal representative of the light signal generated in the plastics scintillator; a calculator connected to the photomultipliers and configured to: detect pulse coincidences between two electrical pulses provided by the photomultipliers associated with a pair of contiguous plastics scintillators; for each pulse coincidence, determine the time offset between the coincidence pulses relative to the pulse having the greatest amplitude taken as a zero reference; determine the number of pulse coincidences the time offset of which is included in a time offset window.

Abstract: The invention relates to a solid organic scintillator comprising a polymeric matrix in which there are dispersed one or more fluorophore compounds and one or more chemical elements having an atomic number ranging from 40 to 83, characterized in that said scintillator has a weight content of said chemical elements of at least 5% by weight relative to the total weight of the scintillator, and in that the scintillator emits an emission spectrum comprising an emission peak at a wavelength of at least 550 nm.

Abstract: A radiation detecting system, including: plastics scintillators juxtaposed to form at least one pair of contiguous plastics scintillators; a photomultiplier associated with each plastics scintillator to provide an electrical signal representative of the light signal generated in the plastics scintillator; a calculator connected to the photomultipliers and configured to: detect pulse coincidences between two electrical pulses provided by the photomultipliers associated with a pair of contiguous plastics scintillators; for each pulse coincidence, determine the time offset between the coincidence pulses relative to the pulse having the greatest amplitude taken as a zero reference; determine the number of pulse coincidences the time offset of which is included in a time offset window.

Abstract: A plastic scintillator material, a plastic scintillator prepared by shaping the material, a detection portal, and a method for discrimination a signal due to fast neutrons. The plastic scintillator material including a polymeric matrix into which is incorporated at least one fluorescent compound at a mass concentration greater than or equal to 10% by mass of the total mass of the material. The polymeric matrix comprises a crosslinked polymer obtainable by polymerization of a mixture comprising at least one aromatic monomer and at least one monomer which is a crosslinking agent selected from the group consisting of an alkyl diacrylate, an alkyl dimethacrylate, and a mixture thereof, and molar proportions of the crosslinking monomer and of the aromatic monomer in the mixture are from 10% to 50% and from 90% to 50%, respectively.

Abstract: A method and a device for compensation-based measurement of the alpha and/or beta radioactivity in a gamma background noise comprising a compensation probe comprises a first sensor allowing the measurement of the alpha and/or beta and gamma radioactivity and a second sensor not allowing the measurement of the alpha and/or beta radioactivity but allowing the measurement of the gamma radioactivity; wherein the sensors are arranged to be exposed substantially to the same gamma background noise; measurement biases being associated with the geometric arrangement of the sensors on account of the anisotropy of the gamma radiation; the measurement system determines the alpha and/or beta radioactivity by compensation comprising a subtraction between the measurement of alpha and/or beta and gamma radioactivity and the gamma measurement, the compensation minimizing the measurement biases associated with the geometric arrangement of the sensors.

Abstract: A device for processing signals detected by a set of n neutron detectors, the device including: n switches each including an input and an output, each switch receiving, on its input, a detected signal coming from a different detector, outputs of the n switches being linked to each other; and a clock generator including a clock circuit and a sequential counter controlled by the clock circuit and configured to deliver a plurality of pulse series, each pulse series of the plurality of pulse series constituting a control signal of a different switch, the pulses of any two pulse series of the plurality of pulse series being disjointed.

Abstract: A method for processing electrical signals from a phoswich scintillator including an upstream scintillator and a downstream scintillator, the method including, for each electrical signal: digitization of the electrical signal; determination of an amplitude and an integral surface area of the digitized electrical signal; and representation of an event associated with an electrical signal by a pair of data items.

Abstract: A plastic scintillator material comprising a polymeric matrix into which is Incorporated at least the one fluorescent compound at a mass concentration greater than or equal to 10% by mass of the total mass of the material, wherein the polymeric matrix consists of a crosslinked polymer obtainable by polymerization of a mixture comprising at least one aromatic monomer and at least one monomer playing the role of a cross-linking agent selected from among alkyl diacrylates, alkyl dimethacrylates, and mixtures thereof, the molar proportions of the monomer playing the role of a crosslinking agent and of the aromatic monomer in the mixture being from 10% to 50% and from 90% to 50%, respectively. A plastic scintillator prepared by shaping said material.

Abstract: A method for detecting a radioactive source moving on a linear path substantially parallel to an alignment of N detectors. The method includes: forming NxNt pulse counting values Mi,t (i=1, 2, . . . , N and t=1, 2, . . . , Nt) from NxNt detection signals delivered by the N detectors in the form of a succession over time of Nt sets of N signals simultaneously detected by the N detectors over a same duration ?t, a pulse counting value representing a number of pulses detected by a detector over a duration ?t; and computing, using a computer: a set of Nt correlation products Rt, a static mean R of the NxNt counting values, a correlation condition for each correlation product Rt.

Abstract: The invention relates to a scintillator for detecting neutrons and/or gamma photons, characterised in that it comprises a structure consisting of two undoped plastic materials for detecting neutrons and which contain different fluorescent complexes, a first plastic material containing at least one fluorescent complex able to produce a fluorescence light having a first relaxation time and the second plastic material containing at least one fluorescent complex able to produce a fluorescence light having a second relaxation time higher than the first relaxation time.

Abstract: The invention relates to the use of 1,8-naphthalimide derivatives and of their salts as scintillation agents and more specifically as agents for discriminating between fast neutrons and gamma rays. It also relates to liquid scintillators comprising these scintillation agents in solution in a solvent and to novel 1,8-naphthalimide derivates of use as scintillation agents, in particular for discriminating between fast neutrons and gamma rays. Applications: all the fields of use of scintillators and in particular industry, geophysics, fundamental physics, in particular nuclear physics, the safety of goods and people, protection from radiation of workers in the industrial, nuclear and medical sectors, medical imaging, and the like.

Abstract: A method for processing electrical signals from a phoswich scintillator including an upstream scintillator and a downstream scintillator, the method including, for each electrical signal: digitization of the electrical signal; determination of an amplitude and an integral surface area of the digitised electrical signal; and representation of an event associated with an electrical signal by a pair of data items.

Abstract: A system for controlling photomultiplier gain drift is disclosed. According to one aspect, the system includes first means for measuring a noise signal of the photomultiplier, the first means configured emit a measurement signal representative of the photomultiplier's noise signal. The system further includes second means for maintaining the measured noise signal at a constant level, based on the measurement signal. The disclosed embodiments apply to stabilization of the gain of photomultipliers and, more specifically, to stabilization of neutron measurement systems using photomultipliers.

Abstract: A system for transmitting an electrical signal, notably a frequency-related electrical signal, includes two conducting lines each having a central conductor surrounded by a conducting sheath, the lines being coupled and isolated from one another at each end by a transformer. The central conductor of a line is linked at the input of the system to a coil of a first transformer and at the output of the system to a coil of the second transformer. The invention is applied for example for the transmission of strongly disturbed environment measurement signals.

Abstract: The invention relates to a solid organic scintillator comprising a polymeric matrix in which there are dispersed one or more fluorophore compounds and one or more chemical elements having an atomic number ranging from 40 to 83, characterized in that said scintillator has a weight content of said chemical elements of at least 5% by weight relative to the total weight of the scintillator, and in that the scintillator emits an emission spectrum comprising an emission peak at a wavelength of at least 550 nm.

Abstract: A smoothing method associated with the on-line measurement of a signal output by an ionizing radiation detector comprising the following steps: detect pulses contained in successive samples of said signal, count the numbers Ni of pulses detected, apply non-destructive filtering to said signal using a variable detection threshold, and apply adaptive smoothing to the filtered signal using non-linear processing as a function of the state of change of said signal so as to obtain a smoothed count rate for said pulses.