The cumulative cross sections for ²³²Th fission products in the energy range of ³He nuclei of 39‒58 MeV are measured. The measurements are made using the activation technique and the foil stack technique. Eighteen cumulative cross sections for the ²³²Th fission products by ³He nuclei with half-lives from one (¹¹²Pd, T_1/2 = 21 h) to 64 (⁹⁵Zr, T_1/2 = 64 d) days are measured for the first time. Being fundamental constants, the results can supplement the existing libraries of nuclear data.

The relevance of research of the interaction of hydrogen isotopes with the fusion reactor materials is primarily due to issues of economics and safety. The study of the influence of defects in materials on the accumulation of hydrogen has a special importance. In this work the radioluminography technique was used to analyze the distribution of tritium in electron-induced tungsten defects. The sensitivity of this technique to the magnitude of electron-induced defects from the point of view of detecting the accumulated tritium is established. The repeated analysis of tungsten samples was performed to assess the change in the distribution of tritium after long-term storage in the atmosphere, because this method allows to analyze repeatedly.

CsPbBr₃ perovskite nanocrystals (PNCs) are the focus of recent basic and applied research, with special emphasis on their use in photovoltaic cells, hybrid light-emitting diodes, single-photon sources, basic elements of optical computers, and other optoelectronic devices. The main problem limiting the use of PNCs is their low stability under normal conditions. Development of composite materials where PNCs are embedded in polymer matrices is an approach to solving the problem of the stability of PNCs contacting the atmosphere. Here, we report the results of experiments on designing composite thin films (TFs) consisting of PNCs and modified polymethyl methacrylate (PMMA). Specifically, samples of durable TFs containing CsPbBr₃ with a high photoluminescence quantum yield have been engineered, optimal parameters (including the spinning time, spinning rate, and concentration) for the spin-coating fabrication of the TFs have been found, and the TFs with a highly homogenous film coating have been obtained. This last factor is an important criterion for the use of PNC–PMMA composite as an active layer in quantum dot light-emitting diodes (QDLEDs). In addition, since PNCs are promising as a basis for the scintillating coating of detectors, whose performance depends on the homogeneity of the luminophore distribution within the scintillator (e.g., a CCD array), the results of this study could be used in developing X-ray detectors for medical applications.

The paper presents the results of the creation of a new tool that allows one to study the physical processes occurring during the operation of a pulsed switch with optical control. Practical data have been obtained on the limiting measured parameters of the installation and the results of corpuscular studies in the residual medium of a rarefied gas.

The results of work on the development and creation of electrophysical equipment designed for in-depth study of issues related to the qualitative and quantitative composition of the residual gaseous medium in the electrovacuum devices, the study of gases during sorption/absorption, as well as the control of the tightness of the electrovacuum devices shells using various methods are presented.

The FRAGM experiment was carried out on the multipurpose accelerator complex ITEP TWAC, which generated of protons and ions beams for various research in the nuclear physics. This article presents a technique for identifying fragments in secondary ion beams based on analysis of correlation distributions in time-of-flight and amplitude signal from scintillation detectors. The experimental data were obtained by fragmentation of a carbon beam with an energy of 300 MeV/nucleon at scanning the rigidity of the magnetooptical channel with a step of 50 MeV/c. Differential cross sections were obtained using the beryllium isotopes ion production process. The obtained results are compared with predictions of the binary cascade model.

Ion accelerator is multi-tool used for effects of neutron irradiation of reactor materials simulating. The heavy ion accelerator HIPr (Heavy Ion Prototype) is used for radiation damage in steels and alloys simulating at ITEP (National Research Centre “Kurchatov institute”). In the main irradiations is carried out with iron ions Fe²⁺ but, if necessary, vanadium, tantalum, carbon and many others ions beams can be used. It is necessary to implant hydrogen and helium into the area of damage for effect of nuclear reaction products on reactor structural materials simulating. The second channel is created for simultaneous irradiation with heavy and light ions for improving experiments. The paper considers the design of a solenoid which is used to focus a helium ion beam from ECR source and the method of its power supply.

When considering X-ray radiation registration by a scintillation detector, A. Bousselham et al. (Photoelectron Anticorrelations and Sub-Poisson Statistics in Scintillation Detectors), introduced two Fano factors (the Fano factor for scintillation photons and the Fano factor for photoelectrons). They stated their experimental data provided direct evidence for sub-Poissonian statistics for light photons in scintillators. An accurate mathematical description of the processes in the X-rays registration by a scintillation detector allows one to obtain the correct formulas for the mean value, the output signal variance of photodetectors, and the formula for the covariance between the signals of photodetectors. An analysis of these formulas allows one to conclude that a scintillation detector should be characterized by only one Fano factor, which determines the fluctuations of the electron–hole pair generation process in the scintillator. Since the Fano factor for electron–hole pairs in scintillators is on the order of 0.1, this fact explains the results obtained in the article. Thus, the discovery of sub-Poissonian statistics for light photons in scintillators did not take place.

The work is devoted to studying the formation of a high-current stage of a pulsed discharge in cesium vapor from a continuously burning auxiliary plasma channel. A comparison of the electrophysical parameters and the radiation characteristics of a pulsed discharge in the presence and absence of an auxiliary discharge was made. Recommendations for choosing the parameters of the auxiliary discharge source of power to ensure the stability of radiation pulses of opto-electronic systems were given.

A study of events with two opposite-sign electrons and muons in the final state to search for Standard Model Higgs boson and heavy resonance in the decay channel to two W-bosons is performed in the ATLAS experiment at the LHC. Authors within the HWW group performed an analysis of events using full statistics of pp-collisions recorded during 2015–2018 year exposures at 13 TeV in their rest-frame. Thanks to a use of a deep neural network, we were able to improve significantly our previous results on the extraction of the H-boson signal in the vector-boson-fusion production mechanism. In the framework of different theoretical models new expected upper limits on a heavy resonance production cross section with spin 0, 1 and 2 were calculated in addition to those obtained earlier in the NWA toy model for a heavy Higgs boson.

The processes influencing on the ohmic losses at the border between the reactively magnetronsputter deposited thin film oxide FTO electrodes and the polymer electrolyte within the cell of an electrochomic device are considered. The function of the registered full ohmic resistance of the device from the total electrical charge collected during the tinting process is established. The influence of the surface area of the device on the contribution to its total ohmic resistance from the resistance of directly the thin-film oxide electrodes is estimated. The assumption about the presence of a random number of ECD charge carriers on the surface of its electrodes at the initial moment of the coloring process, which also contributes to the initial ohmic resistance of the device, was confirmed by independent impedance spectroscopy of the electrolytic layer.

Information is provided on professional external and internal irradiation in 2020 of personnel of organizations, including nuclear power plants, in the territories serviced by the FMBA of Russia. The quantitative distribution of 532 objects operating ionizing radiation sources by departmental affiliation and type of activity is given. The radiation dose of the personnel is grouped according to the departmental affiliation of the objects. The parameters of dose distributions are calculated: mode, median, mean, mean square deviation, quantile and coefficient of variation. The distribution of the number of personnel working with ionizing radiation sources is presented according to the dose intervals for taking into account individual radiation doses at facilities of different departmental affiliation. The value of the collective dose is given, taking into account the contribution of seconded personnel, as well as the value of the average individual dose for nuclear power plants united by reactor type. The analysis of radiation doses depending on the profession was carried out. A large number of zero individual radiation doses at nuclear power plants were noted. The conclusion is made about the satisfactory radiation situation in organizations serviced by the Federal Biomedical Agency. A comparison was made with the radiation doses of personnel in 2013 and 2017 and with data for other countries: France, USA, Germany, Great Britain and China.

The search of new approaches to development of radiopharmaceuticals based on antibodies and the retention of their specificity and affinity to antigens remains one of the most important problems of radiopharmaceutics. The metal-binding protein metallothionein has been proposed as a chelator for the α-emitting radionuclide ²¹³Bi. In this work the results of biodistribution study of ²¹³Bi−metallothionein (²¹³Bi−MT), ²¹³Bi−immunoglobulin (²¹³Bi−IgG) and free ²¹³Bi in a form of ²¹³BiCl₃ in intact mice are presented.

This paper demonstrates the capabilities of a compact non-anthropomorphic water dynamic phantom for spot scanning proton therapy. This phantom simulates the intrafractional motion of a tissue-equivalent target in water based on various motion patterns. The design of the phantom is optimized for use with fixed horizontal beam setups without gantry. The phantom targets are compatible with standard dosimetry equipment such as ionization chambers and dosimetric films. The dynamic phantom has small dimensions and weight, low cost, wide functionality with the possibility of its refinement, and is also easy to use. The phantom can be used both for research purposes and for routine quality assurance of proton therapy for intrafractionally moving tumors.