scholarly journals Dp breakup reaction investigation under specific kinematic configurations at ITS of the Nuclotron

2019 ◽  
Vol 204 ◽  
pp. 10012
Author(s):  
M. Janek ◽  
A.V. Averyanov ◽  
E.V. Chernykh ◽  
D. Enache ◽  
Yu.V. Gurchin ◽  
...  
Keyword(s):  
Energy Range ◽  
Degrees Of Freedom ◽  
Significant Contribution ◽  
Relativistic Effects ◽  
Nucleon Nucleon ◽  
Breakup Reaction ◽  
Internal Target ◽  
Polarized Beams ◽  
Breakup Data

Dp breakup reaction is investigated in the energy range 300-500 MeV at the Internal Target of the Nuclotron using unpolarized and polarized beams by DSS collaboration. The goal of the study is to obtain information about nucleon-nucleon correlations at short distances, non-nucleonic degrees of freedom and relativistic effects. A part of the breakup data at 300 MeV and 400 MeV has been obtained in kinematics where relativistic effects would have a significant contribution.

scholarly journals dCH2 and dC spectra obtained for some kinematic configurations at intermediate energies

2015 ◽  
Vol 39 ◽  
pp. 1560095
Author(s):  
M. Janek ◽  
G. Tarjanyiova ◽  
Yu. V. Gurchin ◽  
A. Yu. Isupov ◽  
A. N. Khrenov ◽  
...  
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Energy Range ◽  
Deuteron Beam ◽  
Relativistic Effects ◽  
Geant4 Simulation ◽  
Internal Target ◽  
Text Data ◽  
Target Station ◽  
Intermediate Energies

Experimental [Formula: see text] data have been obtained by nine detector configuration at 400 MeV at Internal Target Station of Nuclotron with using Polyethylene and Carbon targets. After detector calibration experimental data were compared with GEANT4 simulation. Experimental data have been taken at detector configuration in which possible relativistic effects can appear. [Formula: see text] reaction is planned to be investigated at the extracted beam of Nuclotron at energy range of 1.0–1.75[Formula: see text]GeV. Presented simulation of the reaction is aimed on possibility to perform experimental study at extracted deuteron beam of Nuclotron with partial using of BM@N setup.

Relativistic Multiple Scattering Theory

1991 ◽  
Vol 253 ◽  
Author(s):  
B. L. Gyorffy
Keyword(s):  
Quantum Mechanics ◽  
Degrees Of Freedom ◽  
Relativistic Quantum ◽  
Schr6dinger Equation ◽  
Relativistic Effects ◽  
Relativistic Quantum Mechanics ◽  
Absolute Minimum ◽  
Crystalline Anisotropy ◽  
Symmetry Properties ◽  
Finite Set

The symmetry properties of the Dirac equation, which describes electrons in relativistic quantum mechanics, is rather different from that of the corresponding Schr6dinger equation. Consequently, even when the velocity of light, c, is much larger than the velocity of an electron Vk, with wave vector, k, relativistic effects may be important. For instance, while the exchange interaction is isotropic in non-relativistic quantum mechanics the coupling between spin and orbital degrees of freedom in relativistic quantum mechanics implies that the band structure of a spin polarized metal depends on the orientation of its magnetization with respect to the crystal axis. As a consequence there is a finite set of degenerate directions for which the total energy of the electrons is an absolute minimum. Evidently, the above effect is the principle mechanism of the magneto crystalline anisotropy [1]. The following session will focus on this and other qualitatively new relativistic effects, such as dichroism at x-ray frequencies [2] or Fano effects in photo-emission from non-polarized solids [3].

scholarly journals The Ground-State Calculations for Some Nuclei by Mesonic Potential of Nucleon-Nucleon Interaction

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
K. M. Hanna ◽  
S. H. M. Sewailem ◽  
R. Hussien ◽  
L. I. Abou-Salem ◽  
Asmaa G. Shalaby
Keyword(s):  
Ground State ◽  
Degrees Of Freedom ◽  
Vector Fields ◽  
Theoretical Models ◽  
Nucleon Nucleon ◽  
Particle Energy ◽  
Exchange Potential ◽  
Hartree Fock ◽  
Scalar And Vector Fields ◽  
Nucleon Nucleon Interaction

The interaction of nucleon-nucleon (NN) has certain physical characteristics, indicated by nucleon, and meson degrees of freedom. The main purpose of this work is calculating the ground-state energies of  12H and  24He through the two-body system with the exchange of mesons (π, σ, and ω) that mediated between two nucleons. This paper investigates the NN interaction based on the quasirelativistic decoupled Dirac equation and self-consistent Hartree-Fock formulation. We construct a one-boson exchange potential (OBEP) model, where each nucleon is treated as a Dirac particle and acts as a source of pseudoscalar, scalar, and vector fields. The potential in the present work is analytically derived with two static functions of meson, the single-particle energy-dependent (SPED) and generalized Yukawa (GY) functions; the parameters used in meson functions are just published ones (mass, coupling constant, and cutoff parameters). The theoretical results are compared to other theoretical models and their corresponding experimental data; one can see that the SPED function gives more satisfied agreement than the GY function in the case of the considered nuclei.

Adiabatic and coupled channels calculations for near barrier fusion of 16O +238U using realistic nucleon–nucleon interaction

2016 ◽  
Vol 25 (04) ◽  
pp. 1650026 ◽  
Author(s):  
M. Ismail ◽  
W. M. Seif ◽  
M. M. Botros
Keyword(s):  
Cross Section ◽  
Degrees Of Freedom ◽  
Fusion Cross Section ◽  
Nucleon Nucleon ◽  
Distribution Profile ◽  
Fusion Barrier ◽  
Coupled Channels ◽  
Barrier Distribution ◽  
Fusion Barrier Distribution ◽  
Double Folding

We investigate the fusion cross-section and the fusion barrier distribution of [Formula: see text]O[Formula: see text]U at near- and sub-barrier energies. We use an interaction potential generated by the semi-microscopic double folding model-based on density dependent (DD) form of the realistic Michigan-three-Yukawa (M3Y) Reid nucleon–nucleon (NN) interaction. We studied the role of both the static and dynamic deformations of the target nucleus on the fusion process. Rotational and vibrational degrees of freedom of [Formula: see text]U-nucleus are considered. We found that the deformation and the octupole vibrations in [Formula: see text]U enhance its sub-barrier fusion cross-section. The signature of the the octupole vibrational modes of [Formula: see text]U appears clearly in its fusion barrier distribution profile.

scholarly journals The Deuteron Beam Polarimetry at Nuclotron-NICA

2016 ◽  
Vol 40 ◽  
pp. 1660087 ◽  
Author(s):  
V. P. Ladygin ◽  
P. K. Kurilkin ◽  
A. Yu. Isupov ◽  
M. Janek ◽  
S. G. Reznikov
Keyword(s):  
Elastic Scattering ◽  
Energy Range ◽  
Deuteron Beam ◽  
Low Energy ◽  
Beam Polarization ◽  
Wide Energy Range ◽  
Internal Target ◽  
Wide Energy ◽  
The Asymmetry

The current deuteron beam polarimetry at Nuclotron is provided by the Internal Target polarimeter based on the use of the asymmetry in dp- elastic scattering at large angles in the c.m.s. at 270 MeV. The calibration of the existing deuteron beam polarimeter at Internal Target in the wide energy range will allow to obtain the accuracy of the vector and tensor beam polarization values of about 3-5%. Further upgrade of low energy and extracted beam polarimeters is discussed.

scholarly journals Application of the JISP16 potential to the nucleon induced deuteron breakup process at E=13 MeV and E=65 MeV

2020 ◽  
Author(s):  
Volodymyr Soloviov ◽  
Jacek Golak ◽  
Roman Skibiński ◽  
Kacper Topolnicki ◽  
Henryk Witała
Keyword(s):  
Phase Space ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Nucleon Nucleon ◽  
Breakup Reaction ◽  
Breakup Process ◽  
Deuteron Breakup ◽  
Nucleon Potential ◽  
Incoming Nucleon

The JISP16 nucleon-nucleon potential has been applied to investigations of the nucleon induced deuteron breakup reaction at the incoming nucleon laboratory energies E = 13 MeV and E = 65 MeV. We have found that for the studied process the JISP16 force gives a description of the exclusive cross section, which is generally similar to the ones obtained with the standard realistic nucleon-nucleon AV18 interaction. However, there are some regions of the phase space where the differential cross sections predicted by the JISP16 and AV18 models, differ by more than 100 %. These special kinematical configurations may possibly be useful to refit the JISP16 force parameters.

scholarly journals Quantum-Mechanical Substantiation of the Periodic System of Isotopes. Models of Nuclear Orbitals

2021 ◽  
pp. 1-26
Author(s):  
AS Magula ◽  
Keyword(s):  
Periodic System ◽  
Degrees Of Freedom ◽  
Nucleon Nucleon ◽  
Quantum Mechanical ◽  
Spherical Coordinate ◽  
Crystal Forms ◽  
Electromagnetic Interactions ◽  
Quantum Numbers ◽  
The Family ◽  
Fundamental Cause

The topic of this article lies in the field of problems: substantiating the periodic system of isotopes and the principle of multilevel periodicity using quantum mechanical calculations, combining strong and electromagnetic interactions, and searching for the fundamental cause of periodicity in general. This article is a theoretical section and a continuation of the article: "Periodic system of isotopes", in which the system was checked against 10 types of experimental data, the periodic change of properties at the level of nuclei and the vertical symmetry of subgroups of isotopes were found. Periodic system of isotopes was constructed with the help of a special algorithm, the principle of multilevel periodicity of the atom, from the electrons to the nucleus. As a description of the multilevel periodicity, this paper presents a unified system of quantum numbers, which is used to describe both electron and nucleon shells (binomial probabilistic interpretation). With the binomial interpretation the problem of a particle in a one-dimensional potential well has been solved; quantummechanical calculations for the probability functions of the orbitals and periods of both electrons and nucleons have been performed - characteristic equations have been obtained, the projections of electronic orbitals have been reproduced and the binomial interpretation has been shown to correspond to the family of spherical harmonics. For the electron orbitals the calculation and analysis of solutions of the Schrödinger equation for the binomial interpretation of quantum numbers have been performed. The spatial nature of quantum numbers, for this interpretation, in the form of degrees of freedom is shown. Based on the principle of multilevel periodicity, expressions are derived and planar projections of nucleon nucleon orbitals are constructed, and similarity of the forms with electron orbitals is analyzed and revealed. A critical analysis of the modern spherical coordinate system was made, possible errors in the construction of electron orbitals were shown and, taking into account the drawbacks, two alternative spherical coordinate systems were proposed, for which Lame coefficients were calculated and Laplace equations were derived. As a search for the fundamental cause of multilevel periodicity, a spatial model with changing degrees of freedom 0-n is presented, its manifestation in nature (crystal forms) is found; a number of experiments are proposed; the predictions about the applicability of the multilevel periodicity principle in quark theory are made

scholarly journals Energy dependence of the vector Ay and tensor Ayy and Axx analyzing powers in deuteron-proton elastic scattering at large scattering angles

2019 ◽  
Vol 204 ◽  
pp. 01019 ◽  
Author(s):  
V.P. Ladygin ◽  
A.V. Averyanov ◽  
E.V. Chernykh ◽  
D. Enache ◽  
Yu.V. Gurchin ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Energy Range ◽  
Short Range ◽  
Deuteron Beam ◽  
Nucleon Nucleon ◽  
Ion Source ◽  
Wide Energy Range ◽  
Analyzing Powers ◽  
Proton Elastic Scattering ◽  
Wide Energy

The results on the angular dependencies of the vector Ay and tensor Ayy and Axx analyzing powers in deuteron-proton elastic scattering at large scattering angles are presented. These data were obtained at internal target at the JINR Nuclotron in the energy range 400-1800 MeV using polarized deuteron beam from new polarized ion source. New data on the deuteron analyzing powers in the wide energy range demonstrate strong sensitivity to the short-range spin structure of the isoscalar nucleon-nucleon correlations observed earlier. The perspectives of further studies of the short-range correlations using carbon, polarized deuteron and proton beams are discussed.

scholarly journals Ultrathin Microwave Devices for Polarization-Dependent Wavefront Shaping Based on an Anisotropic Metasurface

2018 ◽  
Vol 8 (12) ◽  
pp. 2471 ◽  
Author(s):  
Kai Guo ◽  
Zhongyi Guo
Keyword(s):  
Degrees Of Freedom ◽  
Beam Splitter ◽  
Ground Plane ◽  
Dielectric Substrate ◽  
Microwave Devices ◽  
Metal Ring ◽  
Microwave Band ◽  
Polarized Beams ◽  
Wavefront Shaping ◽  
Wave Properties

Metasurfaces have recently become a promising material, offering new degrees of freedom in molding electromagnetic wave properties. In this work, we propose and numerically investigate ultrathin microwave devices for polarization-dependent wavefront shaping based on an anisotropic metasurface, which consists of a square metal ring with a cross, a dielectric substrate, and a metal ground plane. It is demonstrated the proposed metasurface can independently manipulate reflective x- and y-polarized wavefronts at frequency of 15 GHz via engineering of the metal cross. Furthermore, the reflective efficient is extremely high, reaching a near-unity value of 0.98. Based on this anisotropic metasurface, a polarization beam splitter is achieved by artificially arranging the spatial distribution of metasurfaces with prescribed geometries. In addition, we successfully design a focusing metasurface to separate the x- and y-polarized beams via focusing them at different positions. The proposed approach paves a way toward the applications of the metasurface in a microwave band.

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