Physics of Particles and Nuclei Letters 
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This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.Determination of Carbon Concentration in Soil Using the Tagged Neutron Method
AbstractThe results of determining the mass concentration of carbon in soil are discussed. The measurements were made on a facility operating according to the tagged neutron method, which consists of irradiating samples with 14 MeV fast neutrons and detecting the characteristic spectra of gamma rays from inelastic neutron scattering at specific time ranges between neutron emission and arrival of the γ-quantum signal. The values of the accuracies of the measurements have been estimated, the standard deviation of the repeated measurements for concentrations of carbon of 1–3% was σr = 0.14%, the convergence to the calcula...
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Position-Sensitive Measurements of a Single-Mode Laser Beam Spot Using the Dividing Plate Method
AbstractNew position-sensitive experimental results have been obtained using the Dividing Plates method to detect the displacement of a single-mode laser beam spot of various diameters. Measurements show that with this method it is possible to attain sensitivities down to 0.18 µm–1 for a laser beam spot diameter of 8.8 µm displaced over 2.4 µm diameter zone, defined as the area where measurements non-linearities are within 1%. The achievable measurement accuracy is limited by ADC noise and corresponds to ±0.030 nm. Application of the Dividing Plates method for position-sensitive measurements allows to build a compa...
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Study of Pion Production in νμ Interactions on 40Ar in DUNE Using GENIE and NuWro Event Generators
AbstractThe study of pion production and the effects of final state interactions (FSI) are important for data analysis in all neutrino experiments. For energies at which current neutrino experiments are being operated, a significant contribution to pion production is made by resonance production process. After its production, if a pion is absorbed in the nuclear matter, the event may become indistinguishable from quasi-elastic scattering process and acts as a background. The estimation of this background is very essential for oscillation experiments and requires good theoretical models for both pion production at primary v...
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Towards the Structure of a Cubic Interaction Vertex for Massless Integer Higher Spin Fields
AbstractThe structure of cubic Lagrangian vertex corresponding to the irreducible fields with helicities,\({{s}_{1}},{{s}_{2}},{{s}_{3}}\) ind-dimensional Minkowski space is clarified. The explicit form of the operator\({{\mathcal{Z}}_{j}}\) entering the vertex in a nonmultiplicative way (for\(j = 1\) considered in [6]) is obtained. The solution has been derived within BRST approach with complete BRST operators, which contain all constraints corresponding to the conditions that extract the irreducible fields, including trace operators. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
On Model-Independent Analysis of $$B \to {{K}^{{(*)}}}\nu \bar {\nu }$$ Decays
AbstractSemileptonic flavor changing neutral current transitions of\(B\)-mesons with a pair of neutrinos in the final state are very accurately determined in the standard model (SM) and, thus, provide a sensitive probe for physics beyond the SM. Until recently, the poor tagging efficiency for the\(B \to {{K}^{{(*)}}}\nu \bar {\nu }\) modes made them less advantageous as a probe of new physics (NP) compared to the charged lepton counterparts. The most recent Belle II [1] result on\({{B}^{ + }} \to {{K}^{ + }}\nu \bar {\nu }\) indicates a possible enhancement in the branching fraction of\({{B}^{ + }} \to {{K}^{ + }}\nu \bar ...
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Methods for Monitoring the Longitudinal Momentum Spread of Ions within a Bunch during an Injection into a Synchrotron
AbstractMethods for monitoring the longitudinal momentum spread of ions within a bunch during injections into a synchrotron are discussed. The method of moments for the distribution function of charged particles in a bunch is used when processing a digital signal for the pulse component of the current proportional to the longitudinal intensity of ions circulating in a synchrotron. Examples of using the proposed methods during the injection of a short bunch of carbon ions into the JINR superconducting booster synchrotron and Nuclotron are presented. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Mobile-Based Accelerator Complex for the Detection of Nitrogen-Containing Substances
This article describes a method for detecting hidden nitrogen-containing substances. A description is given of a mobile complex based on a linear electron accelerator (LAE) capable of solving problems of detecting nitrogen-containing substances. The block diagram of the mobile complex is given and the accelerating system used for particle acceleration is described. The rotation of the electron beam is carried out using a special electromagnet located on the beam flight path. A drawing of such an electromagnet is given. The linear accelerator is placed in a container 6 m in length. The results of this work are of undoubted ...
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Optimization of the Ring Imaging Cherenkov Photodetector Shielding Box for Compressed Baryonic Matter Experiment
AbstractCompressed Baryonic Matter experiment at FAIR is devoted to the study of the strongly interacting matter properties at high baryonic densities and moderate temperatures. The systematic investigation of the Ring Imaging Cherenkov photodetector shielding box shape on its magnetic properties has been performed. It is demonstrated that the design of the shielding box with a “wing” located on the bottom plate and a back wall allows to decrease the stray magnetic field value in the vicinity of the photodetectors. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Thermodynamic Characteristics of Doublets of Quadrupole Magnets for the Booster Synchrotron at the NICA Accelerator Complex
This article presents experimental and calculated data on the static heat leak and dynamic heat releases in quadrupole magnets of the booster synchrotron. The results will be taken into account for the development of new superconducting magnets and cryogenic installations. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Radiation Resistance of SiC Detectors after Neutron Irradiation
AbstractThe characteristics of detectors based on silicon carbide (SiC) before and after irradiation with integral neutron fluxes of 5.11 × 1013 and 5.39 × 1014 n/cm2 are presented. On the samples irradiated with the maximum fluence, using alpha particles, a deterioration in the energy resolution by an order of magnitude and a decrease in the efficiency of charge collection by ∼25% are shown. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Exploring Dynamics of A4 Flavour Symmetry Using Low Scale Seesaw Mechanisms
This study can provide useful insight into the hitherto unknown dynamics of flavour symmetry and hence can contribute as an important ingredient in the model building for future studies. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Optical Fiber Splitter for Photodetector Testing
AbstractThis paper presents the design and study of an optical fiber splitter with a uniformity of light distribution better than 10%. The main idea is to place the fibers equidistantly from the center, simplifying manufacturing and providing better uniformity of the light intensity compared to a beam splitter. Such a splitter is convenient to use for the mass characterization of photodetectors in single-photoelectron mode, because the same statistical accuracy is ensured during simultaneous testing. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Operating Principles of the Joint Institute for Nuclear Research Grid Site Accounting System
AbstractThe basic operating principles of a new accounting system for JINR Tier1 and Tier2 grid sites, which are components of the Multifunctional Information and Computing Complex (MICC) of the Meshcheryakov Laboratory of Information Technologies, are revealed. The new system completely repeats the functionality of the older system, significantly expands its capabilities, and is integrated into the general MICC monitoring system (LITMon). (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
Monte Carlo Simulation of the Experimental Setup for Studying Entangled Annihilation Photons
AbstractThis work presents the GEANT4 simulation of the experimental setup for studying the Compton scattering of annihilation photons and compares the simulation results with the experimental data. Two 511 keV photons are born in electron-positron annihilation at rest and have mutually orthogonal polarization which is measured by the system of Compton polarimeters. Each polarimeter consists of scatterer of initial annihilation photons and NaI(Tl) detectors of scattered at 90° photons. Additionally, an intermediate scatterer of GAGG scintillator is used to produce the tagged decoherent photons. Different cases of two-ph...
Source: Physics of Particles and Nuclei Letters - December 1, 2022 Category: Physics Source Type: research
JDS-JOIN2 Repository as a Workspace for Scientific Output
AbstractNowadays scientific communication plays an important role in providing society and researchers with scientific information. One of the components of communication is providing access to publications with the scientific output of researchers. Open scientific infrastructures like open repositories and Open Access journals helps to bring knowledge to readers. Within the framework of the cooperation agreement between JINR and DESY, together with the participants of the JOIN2 project, an institutional repository JINR Document Server (JDS) was created at JINR for storing the information resources of the institute and pro...
Source: Physics of Particles and Nuclei Letters - October 1, 2022 Category: Physics Source Type: research
