Problems of the development of liquid organic scintillators are discussed from the point of view of the content of radioactive impurities in detectors for recording rare events. The results of ...investigations of various methods for purifying individual scintillator components from U, Th, and K are presented. It is shown the PPO (2,5-Diphenyloxazole) scintillation additive, where the concentration of potassium may range between 0.8 and 7.1
g/g, is the main source of contamination with potassium (
K). In linear alkylbenzene (LAB, Russia), which is viewed as a promising dissolver for creating a large-scale neutrino detector, the measured concentration of potassium is about 10
g/g.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Metal-loaded liquid organic scintillators (MeLS) are discussed from the point of view of light yield at high metal loading (Gd, Nd, Zr, In). It is shown that, when metal
-diketonates are introduced ...into the scintillator, its light yield is always lower than when carboxylates are used, which is explained by the structural difference between these complexes. The nature of the metal in some cases (Nd) also affects the light attenuation length and, consequently, the MeLS light yield. The composition of the solvent (the fraction of aromatics in the main solvent) and the degree of purification of the introduced metal complex also have a significant effect on the light yield.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Industrial Detector of REactor Antineutrinos for Monitoring (iDREAM) is a 1 ton Gd-doped liquid scintillator detector mounted in the Kalinin nuclear power plant (Russia), 20 m from the 3 GW
VVER type ...commercial reactor. Antineutrinos are detected via inverse beta decay on protons. Beginning in 2021, the detector is collecting data both in reactor ON and OFF modes. The first iDREAM antineutrino results are presented, showing no doubt on the proper operation of the detector as a counting device.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Abstract
The paper is devoted to the description of the iDREAM
detector and its systems. iDREAM is a prototype detector designed to
demonstrate the feasibility of antineutrino detectors for remote
...reactor monitoring and safeguard purposes. Antineutrinos are
detected with a 1 ton liquid scintillator via inverse beta decay on
protons. In order to suppress cosmic muons, gamma and neutron
background, the detector is housed in a dedicated shielding. The
detector is installed at the Kalinin nuclear power plant (Russia),
20 m from the 3 GW
th
reactor core.
Obtained oxide systems of titanium and silicon dioxide containing platinum and palladium nanoparticles. As a reducing agent and nanoparticles stabilizer used heteropolyethers, obtained by controlled ...hydrolysis of titanium and silicon alkoxides in the presence of 1,10-decanediol.
In the present study the properties and structure determination of self-reinforced materials based on ultra high molecular weight polyethylene and oxides particals of titanium, zirconium and hafnium ...have been carried out. tribological characteristics of these composites were also investigated.
New complex of Pd (II) with phenylacetonitrile, suitable for use as a precursor of palladium nano particles in the composition of metal-based composite UHMWPE was obtained. The thermodynamic ...characteristics of metal-polymer composite, found the effect of nano particles of palladium in the crystallization processes in UHMWPE and other characteristics of the material.
Represented work was done to identify possible reaction ways of titanium carboxamide complexes with various organic compounds, mainly alcohols, resulting in the formation of particles of titanium ...dioxide in non-aqueous media. The titanium tetrachloride and N-methylformanilide complex was selected as the subject of research. We studied the reaction of this compound with various alcohols.
Studies have been conducted on composite materials based on UHMWPE containing nanoparticles of titanium, zirconium and hafnium oxides by DSC, DRS, IR, XRF and SEM.
The processes of solvolysis of titanium tetrachloride in nonaqueous media were studied. The influence of the conditions of solvolysis on the size and morphology of the particles of titanium dioxide ...produced have been described.
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