Nuclear-spin polarized targets play a key role in experimental nuclear and particle physics. They are essential for understanding how the proton and neutron get their spins from their constituent quarks and gluons and for measuring the electromagnetic structure of these nucleons. The principle of operation of the Frozen Spin polarized Target is based on a long nuclear spin relaxation time at...
For clarifying the validity of the Lepton Universality hypothesis, the interaction cross section for all three flavors of leptons have to be known with high precision. In neutrino sector, for electron and muon neutrinos, the interaction cross section is known fairly well, but for tau neutrino only poor estimations exist. In particular, the most direct measurement by the DONuT experiment was...
Our department is developing design of MSC230. The machine is a new generation medical cyclotron accelerating protons to 230 MeV energy. This talk is purposed to give the quick overview of the project, it current status, recent updates and changes. Some peculiarities of design using COMSOL, CST and MATLAB are also included.
The report presents developments in the creation of microtomography systems for preclinical studies on laboratory animals. The results of SPECT and CT scanning on phantoms are presented, as well as the results of combining these modalities.
Energy production in stars occurs in chains of thermonuclear reactions and is accompanied by emission of neutrinos which provide important information on the stellar interior. CNO cycle of thermonuclear reactions is believed to be the primary energy production mechanism in stars heavier than the Sun. In spite of playing a subdominant role in the Sun itself, it can still be observed through the...
Nucleoside analogues are a class of chemotherapeutic drugs that are used to increase tumor sensitivity to ionizing radiation (IR). In this work, we study the effect of the arabinoside-cytosine inhibitor AraC on the induction and elimination of DNA double-strand breaks (DSB) under the action of IR with different physical characteristics. Normal human fibroblasts and human tumor cells...
The idea of using cytostatic drugs to increase the effectiveness of radiation therapy is of great interest to radiobiologists. In our experiments, 12 out of a total of 16, male, Sprague Dawley rats received a 3Gy dose of protons with 170 MeV energy in the cranio-caudal direction. The AraC dose of 0.4 g/m2 was administrated into the tail vein. The organs belonging to 4, 6 and respectively 4...
Neutrophil extracellular traps (NETs) are produced by neutrophilic granulocytes and consist of decondensed chromatin decorated with antimicrobial peptides. They defend the organism against intruders and are released upon various stimuli, including ultraviolet (UV) radiation. It’s well known that extended exposure of the skin to UV leads to its damage and loss of protective properties. Many...
Information about various properties of atomic nuclei, as well as nuclear reaction data is often needed in experimental data processing programs. Access to the necessary information could be quite complex because of old-fashion punched card -like format which is used in nuclear structure or nuclear reaction databases. Sometimes there are no experimental information about particular reaction...
The new experimental setup has been built at the 11b channel of the IBR-2 research reactor at FLNP, JINR, to study the elemental composition of samples by registration of prompt gamma emission during thermal neutron capture. The setup consists of a curved mirror neutron guide and a radiation-resistant HPGe high-purity germanium detector. The detector is surrounded by lead shielding to suppress...
Structural studies of the penetration of nanopreparations through the biological membrane of the cell, as well as detailed studies of the interaction of nanopreparations with the lipid bilayer, have not been carried out. To get a clearer picture of this interaction, it is first necessary to develop a method for applying a model membrane. The purpose of the experiment was to investigate the...
The report will show the features of the behavior of fuel claddings caused by uneven energy release in the reactor core. Thermal calculations were carried out, on the basis of which, using the ANSIS software, the forms of deformations, their dependence on the method of fixing the fuel rod were calculated.
The study of cultural heritage by state-of-the-art scientific methods is an important interdisciplinary field [1,2 ]. Of interest are archaeological finds made of metal [3, 4]. Such artifacts store valuable information about the technological, economic and social level of ancient states. Corrosion processes occurring in metals also require careful study, because it improves restoration and...
Efficient neutron reflectors are a key ingredient for improving the performance of cold, very cold and ultracold neutron sources, needed for meeting the challenges placed by high precision fundamental physics experiments and existing experimental techniques. In order to significantly increase the flux of these neutrons, the reflectors made of nanodiamond powders were proposed, theoretically...
One of the most interesting discoveries in the field of nuclear physics made in the 1970s and 1980s was the discovery of spatial parity violation during the fission of nuclei by polarized neutrons. It turned out that the probabilities of the emission of a light fragment along and against the direction of the spin of the initial neutron are different. The asymmetry value is about 10-4. Sushkov...
Archaeological objects, objects of cultural heritage have a special value due to their uniqueness, antiquity and existence in a single copy, therefore, the most justified is the use of modern methods of non-destructive testing for their research. One of such methods of non-destructive testing, which gives sufficiently complete information about the surface and internal structure of the objects...
Safety and fire extinguishing systems at nuclear power facilities
Safety and fire extinguishing systems at nuclear power facilities
Review report on the application of particle accelerators in medicine and industry.
In the interaction reactions of weakly bound cluster nuclei, the structure of these nuclei can manifest itself with a high probability. It is expressed in cross sections for these processes, in particular, in the multinucleon transfer reaction and the transfer reaction of individual clusters. In order to study the influence of the cluster structure on the mechanism of nuclear reactions, we...
The major goals of modern superheavy element physics are the production of superheavy elements with Z=119, 120 and the synthesis of neutron-enriched isotopes, thereby advancing to the center of the “island of stability” (the neutron shell with N=184). In this talk, a multidimensional dynamical model of nucleus-nucleus collisions based on the Langevin equations [1,2] has been used for analysis...
A short review and analysis of the experimental techniques for total reaction cross section σR measurements are presented. The most part of the techniques is based on the transmission and 4π methods. The transmission methods are used the detection of the particles hitted the target and pathed through the target without any interactions. The 4π-methods are used the detection of the reaction...
The constant monitoring of the uniformity of the density distribution of the flux of the accelerated particles is required in various applied fields as such as the studies of biological objects and of radiation resistance of electronic devices. The ionization monitor has been developed at FLNR JINR in order to make the non-destructive detailed high precision measurement of the transverse...
The objectives of the procurement activities are: - complete satisfaction of JINR's needs for products of the required quality, at the required price and time; - expanding opportunities for the participation of legal entities and individuals - suppliers from the countries participating in the Institute in the supply of goods, works, services for the needs of the Institute and creating...
The Drell-Yan process is extremely important for the physics of hadron colliders. Measuring its characteristics is a critical test of the Standard Model at new energies. In particular, the coefficients of the harmonic polynomials describing the angular distributions of the leptons emission are sensitive to the (V - A) structure of weak interactions and can be indicators of the higher orders...
The report presents the results of the participation of a liquid hydrogen target with double helium cooling and a target with cryocooler cooling at the BMN facility under the program of the SRC international physical experiment. Namely, the criteria for selecting target parameters, design features and manufacturing technology, comparison of targets with the indicated types of cooling,...
Ion beam emittance is vital for the evaluation of the extracted beam properties. The transverse emittance, horizontal or vertical, is a measure of the parallelism of the beam and it is proportional to the area filled by the ion trajectories in the phase space plot. In this study we use both analytical and numerical approaches towards definite understanding of a transvesre dynamics for highly...
Magnetic system of the NICA collider includes 46 twin-aperture superconducting quadrupole magnets. The magnetic field measurements of each magnet in operating mode are carried out during assembly and testing of modules. For the time being 75% of the magnets are successfully passed the tests.This paper describes magnetic measurements methods, the development of the dedicated system for...
Dynamic aperture (DA) is one of the key characteristics for any accelerator facilities. The estimation of the lattice elements errors (nonlinearities and integral field value errors, misalignment of the elements etc.) and beam correction system influence at DA are the milestone stage during construction of the facility. Also, the value of the DA is ought to be sufficient (be in excess of the...
One of the tasks of the JINR organizational activity is to conduct excursions in the Institute's laboratories for different types of target audience and age groups. The organization of each excursion goes through a number of steps related to negotiation of excursion time, availabiolity of the facility and the guide. All negotiation were carried out through telephone and email conversations...
The JINR Multifunctional Information and Computing Complex (MICC) provides several computing resources operated by diverse systems with different user interfaces. Therefore using the complex at full capacity can be challenging for scientists and users. The cloud service was developed at the Meshcheryakov Laboratory of Information Technologies. The goal of the service is to give simple access...
Nowadays scientific communication plays an important role in providing society and researchers with scientific information. One of the components of communication is providing access to publication with the scientific output of researchers. Open scientific infrastructures like open access repositories, institutional repositories and Open Access journals helps to bring knowledge to readers. The...
