A method and device for measuring the magnetic rigidity of penetrating charged particles uses an elongated transparent ionizable medium, surrounded by a reflective interface, extending along a helical path around a longitudinal axis. A magnet applies a magnetic field to the medium in a direction along the longitudinal axis. A single luminosity proportional photon detector is operationally associated with the medium and adapted to generate signals indicative of the number of photons transiting the medium. A controller is adapted to receive the signals and calculate a penetration depth of the ionizing particle through the medium based on the number of photons transiting the medium and a magnetic rigidity of the charged particle based upon the penetration depth.

A low cost, rapid, flexible radiation detector uses inorganic metal halide precursors and dyes that respond to self-quenching hybrid scintillation. Remote, high-contrast, laser sensing can be used to determine when exposure of the detector to radiation occurs (even temporally).

A low cost, rapid, flexible radiation detector uses inorganic metal halide precursors and dyes that respond to self-quenching hybrid scintillation. Remote, high-contrast, laser sensing can be used to determine when exposure of the detector to radiation occurs (even temporally).

The present invention relates to a method for measuring radioactivity of radioactive waste, the method comprising an adsorption step (A) of selectively adsorbing a radioactive substance comprising at least one from among radioactive iodine and radioactive cesium from radioactive waste containing radioactive substances on an adsorption member for adsorbing a radioactive substance, and a measurement step (B) of measuring radioactivity of the radioactive substance.

The present invention relates to a method for measuring radioactivity of radioactive waste, the method comprising an adsorption step (A) of selectively adsorbing a radioactive substance comprising at least one from among radioactive iodine and radioactive cesium from radioactive waste containing radioactive substances on an adsorption member for adsorbing a radioactive substance, and a measurement step (B) of measuring radioactivity of the radioactive substance.

Polymerization composition for manufacturing a hybrid material for plastic scintillation detection comprising: monomers, oligomers or their mixtures intended to form at least one constituent polymer of a polymeric matrix; a liquid fluorescent mixture comprising i) 95.6 molar % to 99.1 molar % of a main primary fluorophore consisting of naphthalene and ii) 0.9 molar % to 4.4 molar % of an additional primary fluorophore, the centroid of the light absorption spectrum and of the fluorescence emission spectrum, the fluorescence decay constant and the fluorescence quantum yield of which are judiciously chosen.

The decay constant of the fluorescence of the hybrid material manufactured with the polymerization composition is intermediate between that of a fast plastic scintillator material and of a slow plastic scintillator material. Further, it can be chosen over a wide range.

The invention also relates to ready-for-use kits for manufacturing a polymerization composition.

Neutron dosimetry is performed using a water-based chemical dosimeter measurement of radiation-induced reduction of hexavalent Cr (VI) to trivalent Cr (III) in the presence of sodium formate at pH 9.2. Neutron absorbance material (Gd-157) increases the neutron interaction with the dosimeter. When a monoenergetic beam with 0.025 eV energy was used as a thermal neutron source 1 mol/dm.sup.3 of Gadolinium gave the best outcome while surrounding the dosimeter with 1 cm Gadolinium sheets. The dosimeter was giving acceptable readings when using thermal neutrons.

A method for compensating a measurement deviation of a first scintillator and/or a photodetector of a radiometric fill level measuring device is provided, including detecting, by a second scintillator, radioactive emissions from the second scintillator; transmitting, in response to radioactive emissions, a first light signal from the first scintillator and a second light signal from the second scintillator, the first light signal being different from the second light signal; receiving, by the photodetector, the first light signal from the first scintillator and the second light signal from the second scintillator, and converting the light signals into electrical signals; comparing the electrical signals with deposited reference signals by means of a comparator; and adjusting the gain of the photodetector in response to comparing the electrical signals and stored reference signals. A radiometric fill level measuring device for fill level measurement, for density measurement, and/or for mass flow measurement is also provided.

A method for compensating a measurement deviation of a first scintillator and/or a photodetector of a radiometric fill level measuring device is provided, including detecting, by a second scintillator, radioactive emissions from the second scintillator; transmitting, in response to radioactive emissions, a first light signal from the first scintillator and a second light signal from the second scintillator, the first light signal being different from the second light signal; receiving, by the photodetector, the first light signal from the first scintillator and the second light signal from the second scintillator, and converting the light signals into electrical signals; comparing the electrical signals with deposited reference signals by means of a comparator; and adjusting the gain of the photodetector in response to comparing the electrical signals and stored reference signals. A radiometric fill level measuring device for fill level measurement, for density measurement, and/or for mass flow measurement is also provided.

Presented herein are systems and methods that provide for calibration and/or testing of liquid scintillation counters (LSCs) using an electronic test source. In certain embodiments, the electronic test source described herein provides for emission of emulated radioactive event test pulses that emulate light pulses produced by a scintillator as a result of radioactive decay of a variety of different kinds of radioactive emitters (e.g., beta, alpha, and gamma emitters). Additionally, in certain embodiments, the systems and methods described herein provide for the emission of emulated background light (e.g., luminescence and after-pulses) from the electronic test source. The emulated radioactive event test pulses and, optionally, emulated background light can be used for the calibration and/or testing of LSCs, in place of hazardous radioactive material and/or volatile chemicals. Accordingly, the systems and methods described herein dramatically improve the calibration and/or testing of liquid scintillation counters.