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Reliability Analysis of the Results of the Known Experiments on Measuring of the Sachs Form Factor Ratio Using the Rosenbluth Technique. Polarization of the Final Proton in the $$e\vec {p} \to e\vec {p}$$ Elastic Process
AbstractA criterion for assessing the reliability of measurements of the Sachs form factor ratio using the Rosenbluth technique is proposed and applied to an analysis of three known experiments (Andivahis1994, Walker1994, Qattan2005) and a recent experiment on the CEBAF accelerator upgraded to 12 GeV at JLab (arXiv:2103.01842 [nucl-ex]). Based on the results of the JLab polarization experiments on measuring the ratio\({{{{\mu }_{p}}{{G}_{{\text{E}}}}} \mathord{\left/ {\vphantom {{{{\mu }_{p}}{{G}_{{\text{E}}}}} {{{G}_{{\text{M}}}}}}} \right. \kern-0em} {{{G}_{{\text{M}}}}}}\) in the\(\vec {e}p \to e\vec {p}\) process in th...
Source: Physics of Particles and Nuclei Letters - February 1, 2022 Category: Physics Source Type: research

Digital Pulse Shape Discrimination Method for D –D Neutron Spectrometry Using the LaCl3(Ce) Scintillator
AbstractThe problem of neutron spectroscopy of plasma is substantial in modern magnetic confinement fusion experiments. Most machines operate with deuterium plasma emitting neutrons with energies of ~2.5  MeV. This paper demonstrates the possibility of a digital method for separating signals according to the pulse shape discrimination (PSD) of a scintillation detector based on a LaCl3(Ce) crystal when detecting neutrons and γ-quanta. The analysis of the shape of pulses produced by α particles, neutrons and γ-quanta is carried out. The optimal PSD parameters of a signal separation, namely the figure-of-merit parameters ...
Source: Physics of Particles and Nuclei Letters - February 1, 2022 Category: Physics Source Type: research

The SFiNx Detector System
AbstractA new detector system for investigating the properties of spontaneous fission of short-lived transuranium nuclei has been created. This system consists of an assembly of double-sided silicon strip detectors surrounded by 116 proportional neutrons counters filled with3He. The neutron registration efficiency is 54.7  ± 0.1%. The detector system is tested in an experiment investigating the characteristics of spontaneous fission of the252No isotope. The experimental data on neutron yields are compared with previously published results. The average number of neutrons per fission act (\(\bar {\nu }\) = 4.25\( \pm \) 0....
Source: Physics of Particles and Nuclei Letters - February 1, 2022 Category: Physics Source Type: research

Probe-Absorption Spectrum of a Polar Quantum Emitter in a Squeezed Finite-Bandwidth Vacuum
AbstractA study of the absorption spectrum of a weak-probe beam irradiating a two-level quantum emitter with broken inversion symmetry driven by external monochromatic high-frequency electromagnetic (e.g. laser) field and damped by squeezed vacuum reservoir with finite bandwidth was carried out for the case of the squeezed vacuum source being represented by a non-degenerate parametric oscillator below threshold. It was shown that this atom-driving-field system can either amplify or absorb weak probe electromagnetic radiation beam of much lower frequency than the frequency of the driving field. The shape of the absorption a...
Source: Physics of Particles and Nuclei Letters - February 1, 2022 Category: Physics Source Type: research

On Difference Schemes for the Many-Body Problem Preserving All Algebraic Integrals
AbstractA new approach to creating difference schemes of any order for the many-body problem preserving all its algebraic integrals is proposed. It is based on a combination of two ideas: the method of energy quadratization and the rejection of inheritance symplectic structure. Results of the tests with simplest scheme of this class are presented. A flat three-body problem with equal masses is selected for testing. The case when bodies pass close to each other is considered, for which the algorithm of time step scaling near numerical singularities is specially developed. A comparison with the explicit Runge –Kutta method...
Source: Physics of Particles and Nuclei Letters - February 1, 2022 Category: Physics Source Type: research

Erratum to: Synthesis of Fused Heterocyclic Systems Derived from 2-Aryl-1,2,3,4-Tetrahydroquinolines
An Erratum to this paper has been published: https://doi.org/10.1134/S1547477122010113 (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - February 1, 2022 Category: Physics Source Type: research

Occupational Hazards due to Natural Radioactivity and Heavy Metals in Some Industries
AbstractIn this work, investigations and analyses were carried out to evaluate workers ’ hazards exposure level due to radiological impacts and heavy metal content in granite and cement factories. Based on these evaluations, the hazardous exposure level assessment was conducted through two stages. The first stage includes the evaluation of the radiological hazards via the quantifica tion of multiple parameters: the internal hazard due to radon and its short-lived progeny (represented by its internal and external hazard indices (Hin) and (Hex) respectively), the gamma exposure due to the levels of226Ra,232Th, and40K, radi...
Source: Physics of Particles and Nuclei Letters - December 1, 2021 Category: Physics Source Type: research

Solutions of the Klein –Fock–Gordon Equation and Coherent States on the Horosphere of the Lobachevsky Momentum Space
AbstractSolutions that satisfy the Klein –Fock–Gordon equation in quasi-Cartesian coordinates of the three-dimensional relativistic Lobachevsky momentum space associated with the horospheres of this space are found. The Euclidean plane geometry is realized on these horospheres. This representation of solutions to the Klein–Fock–Gor don equation is closely related to invariant geometric images (horosphere, parallel bundle, and parallel bundle axis) of the three-dimensional Lobachevsky space, in which a part naturally arises associated with the selected direction: the parallel bundle axis orthogonal to horospheres. S...
Source: Physics of Particles and Nuclei Letters - December 1, 2021 Category: Physics Source Type: research

PMT Calibration of the ATLAS Hadron Scintillation Calorimeter, the TAIGA Gamma Ray Observatory, and the TUS Space Experiment
AbstractAs part of the preparation of the TAIGA gamma ray observatory (Republic of Buryatia, Russian Federation) and the TUS space experiment on the Mikhailo Lomonosov satellite, 1400 PMTs of XP1911 type, 1020 PMTs of XP1911/UV type, and 290 PMTs of R1463 type were tested for their main and additional specifications (nominal (operating) voltage, dark current at nominal voltage, quantum efficiency of the photocathode at a wavelength of 480 nm, cathode chamber resistivity, and quality parameters of the dynode system). The number of PMTs that did not meet the selection criteria is 3.9% for XP1911, 15.8% for XP1911/UV, and 4.8...
Source: Physics of Particles and Nuclei Letters - December 1, 2021 Category: Physics Source Type: research

Quantization on a Classical Background Using Bogolyubov Variables
AbstractThis is the continuation of papers [1, 2]. The quantization scheme for interacting fields on the classical background using Bogolyubov variables proposed in [1] combines an exact account of conservation laws and the perturbation theory and avoids the problem of zero modes. Quantization in terms of new variables performed in [2] for the system of gravitational and scalar fields yielded the wave equation for the classical part of the scalar field and Einstein equation for the classical part of the gravitational field as the necessary conditions for using perturbation theory. This paper continues the development of th...
Source: Physics of Particles and Nuclei Letters - December 1, 2021 Category: Physics Source Type: research

A0 Condensation, Nielsen ’s Identity and Effective Potential of Order Parameter
AbstractIn high temperature SU(2) gluodynamics, the condensation of the zero component gauge field potential\({{A}_{0}} = {\text{const}}\) and its gauge-fixing dependence are investigated. The\({{A}_{0}}\) and Polyakov ’s loop\(\left\langle L \right\rangle \) are mutually related. The two-loop effective potential\(W({{A}_{0}},\xi )\) is recalculated in the background relativistic\({{R}_{\xi }}\) gauge. It depends on the parameter\(\xi \), has a nontrivial minimum and satisfies Nielsen ’s identity. These signs mean gauge invariance of the condensation phenomenon. We express\(W({{A}_{0}},\xi )\) in terms of\(\left\langle...
Source: Physics of Particles and Nuclei Letters - December 1, 2021 Category: Physics Source Type: research

A Simple Source Model for 6 MV Flattening Filter Free Photon Beams Monte Carlo Dose Calculations
AbstractThe purpose of this work was to develop a simple source model for Monte Carlo dose calculations of flattening filter free (FFF) 6 MV photon beams. MCNPX2.4 Monte Carlo code was used to simulate 6 MV FFF photon beam from a Varian 2100C/D Clinac. The FFF photon beam features including energy and angular distributions were calculated in a phase space plane located 25.1 cm downstream from the accelerator target. A simple point source model (SM) was developed based on correlated histograms. Differences between measured and calculated profiles were less than 2% of the maximum dose or 2 mm distance to agreement at 100 cm ...
Source: Physics of Particles and Nuclei Letters - December 1, 2021 Category: Physics Source Type: research

Bogolyubov Variables for an Interacting Field System
AbstractThis is the continuation of paper [1], which contained the basic ideas of quantization for nonlinear systems in the neighborhood of nontrivial classical solutions of the equations of motion. Quantization is performed using Bogolyubov variables; this combines an accurate account of conservation laws and perturbation theory and avoids the problem of zero modes. In this paper, the quantization of interacting gravitational and scalar fields is performed using this method. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - December 1, 2021 Category: Physics Source Type: research

The Concept of Particle-Antiparticle and the Baryon Asymmetry of the Universe
AbstractFollowing the results of our publications, in the first part of this letter, we explain that quantum theory based on finite mathematics (FQT) is more general (fundamental) than standard quantum theory based on Poincar é invariance. Standard concept of particle-antiparticle is not universal because it arises as a result of symmetry breaking from FQT to standard quantum theory based on Poincaré or standard anti-de Sitter symmetries. In FQT one irreducible representation of the symmetry algebra describes a particl e and its antiparticle simultaneously, and there are no conservation laws of electric charge and baryon...
Source: Physics of Particles and Nuclei Letters - December 1, 2021 Category: Physics Source Type: research

Minimization of the Long Term Noises of the 24-Bit ADC for the Precision Laser Inclinometer
AbstractThe daylong noises of the 24 bits ADC DT9824 and DT9828 in the laboratory room conditions and in the thermo-stabilized and radio isolated laboratory and the noises dependence on the single measurement duration have been researched. Significantly, by factor 240 × the ADC resolution in the temperature stabilized and radio isolated conditions was improved. The ADC’s relative resolutions have been measured for a daylong period: 3 × 10–7 for DT9824 with 0.79 s for one measurement duration and 2 × 10–7 for DT9828 with one measurement duration of 0.10 s. The innovative methodic for accounting of the ADC noise tem...
Source: Physics of Particles and Nuclei Letters - December 1, 2021 Category: Physics Source Type: research