The study of the refractive scattering of 6Li and 6He on carbon target with the S-matrix approach

2021 ◽  
Vol 36 (36) ◽  
Author(s):  
Liyuan Hu ◽  
Yushou Song ◽  
Yingwei Hou ◽  
Huilan Liu ◽  
Gongming Yu
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Forward Direction ◽  
Matrix Approach ◽  
Carbon Target ◽  
Intermediate Energies ◽  
S Matrix ◽  
Bombarding Energy

In this paper, the S-matrix parametrization is adopted to analyze the refractive scattering of [Formula: see text] at intermediate energies systematically and that of [Formula: see text] at 230 MeV. For [Formula: see text], the experimental data containing the Fraunhofer oscillations and the rainbow falloff are reproduced very well by adjusting parameters. The S-matrix parameters and the rainbow angles show evident tendencies as the bombarding energy increases, which are comparable with those of [Formula: see text] elastic scattering on carbon target. For [Formula: see text], the experimental data in the forward direction are reproduced successfully by slightly adjusting the parameters used in the calculation of [Formula: see text] at 210 MeV. The calculated results show that the [Formula: see text] scattering exhibits a comparable transparency with that of [Formula: see text] at intermediate energies.

Polarization Phenomena in Inclusive Nucleon Transfer Reactions

1998 ◽  
Vol 07 (06) ◽  
pp. 723-746 ◽  
Author(s):  
Yu. A. Berezhnoy ◽  
V. A. Slipko
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Transfer Reactions ◽  
Matrix Approach ◽  
Nucleon Transfer ◽  
Intermediate Energies ◽  
S Matrix ◽  
Wide Energy ◽  
Polarization Phenomena ◽  
Free Parameters

The theory of the polarization phenomena in the inclusive one- and two-nucleon transfer reactions (d,n) and (3 H ,n) at intermediate energies is developed on the basis of the S-matrix approach. Since the parameters of the S-matrix are found from fitting the experimental data for the elastic scattering of protons by the nuclei, the calculated polarization observables of the neutrons released in reactions 40 Ca (d,n), 208 Pb (d,n), 40 Ca (3 H ,n) and 208 Pb (3 H ,n) in the wide energy region do not have any free parameters.

ANALYSIS OF REFRACTION EFFECTS IN NUCLEAR SCATTERING ON THE BASIS OF THE S-MATRIX APPROACH

1995 ◽  
Vol 10 (31) ◽  
pp. 2305-2312 ◽  
Author(s):  
YU. A. BEREZHNOY ◽  
V.V. PILIPENKO
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Light Nucleus ◽  
Optical Model ◽  
Scattering Amplitude ◽  
Intermediate Energy ◽  
Matrix Approach ◽  
Nuclear Scattering ◽  
Atomic Nuclei ◽  
S Matrix

A new S-matrix model is proposed to describe refraction effects in the intermediate energy light nucleus elastic scattering on atomic nuclei. An analysis of experimental data on scattering of 4 He , 6 Li and 16 O nuclei by different target nuclei is made on the basis of this model and the near-far decomposition of the scattering amplitude. Comparison of our results with those obtained by the optical model is discussed.

Peculiarities of 6Li +12C elastic scattering

2019 ◽  
Vol 28 (12) ◽  
pp. 1950108 ◽  
Author(s):  
Sh. Hamada ◽  
Awad A. Ibraheem
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Cluster Structure ◽  
Scattering Data ◽  
The Real ◽  
State Formula ◽  
Nuclear Interference ◽  
Double Folding ◽  
Coupled Channel ◽  
Bombarding Energy

Using the phenomenological optical potential and two different semi-microscopic potentials, namely double folding and cluster folding (CF), the available experimental data for 6Li elastically scattered from [Formula: see text]C nucleus at energies 50–600[Formula: see text]MeV are reanalyzed. On the basis of the well-known cluster structure of 6Li as a composite nucleus consisting of a core “alpha” with a valence particle “deuteron” orbiting this core, special attention was paid to the CF potential. Elastic scattering data for 6Li+[Formula: see text]C system plotted as a function of momentum transfer showed that the real Coulomb nuclear interference region is independent of the bombarding energy. The aforementioned structural behavior for the data could be used to define the potential with some certainty. In addition to a Woods–Saxon imaginary potential of fixed radius, the real part of the potential derived from the cluster structure of 6Li was successful in reproducing the experimental data in the whole angular range. Coupled channel (CC) calculation effects are also performed by coupling to 6Li resonant state ([Formula: see text], [Formula: see text][Formula: see text]MeV).

Phase shift analysis of the 6He+208Pb and the 6He+197Au systems

Open Physics ◽  
2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Orhan Bayrak ◽  
Ismail Boztosun
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Phase Shift ◽  
Long Range ◽  
Excellent Agreement ◽  
Phase Shift Analysis ◽  
Shift Analysis ◽  
S Matrix ◽  
Theoretical Results ◽  
Rainbow Scattering

AbstractWe present the elastic scattering of the 6He+208Pb and the 6He+197Au systems at the laboratory energy of E lab=27 MeV within the framework of the McIntyre parametrization, and systematically investigate χ 2/N analysis of both systems to obtain an excellent agreement between the theoretical results and the experimental data. We find large diffusivity parameters indicating long range absorption mechanisms. We also show that both systems lack both the nuclear and the Coulomb rainbow scattering for obtained S-matrix parameters.

Analysis of α-12C elastic scattering at intermediate energies by the S-matrix model

2017 ◽  
Vol 26 (05) ◽  
pp. 1750027 ◽  
Author(s):  
Yu. A. Berezhnoy ◽  
G. M. Onyshchenko ◽  
V. V. Pilipenko
Keyword(s):  
Elastic Scattering ◽  
Matrix Model ◽  
Cross Sections ◽  
Differential Cross ◽  
Projectile Energy ◽  
Scattering Pattern ◽  
Intermediate Energies ◽  
Wide Range ◽  
S Matrix ◽  
Rainbow Scattering

The results of calculations of differential cross-sections for [Formula: see text]-[Formula: see text]C elastic scattering by the [Formula: see text]-matrix model are presented for 10 energy values in the energy range 65[Formula: see text]MeV[Formula: see text] 386[Formula: see text]MeV in a wide range of scattering angles. The behavior of various scattering characteristics as functions of the projectile energy is analyzed. It is shown that the chosen parametrization of [Formula: see text]-matrix allows describing correctly the Fraunhofer oscillations of the cross-sections in the region of small scattering angles and the rainbow scattering pattern in the region of sufficiently large angles.

SCATTERING AND DISSOCIATION OF DEUTERONS AND 3H-NUCLEI BY NUCLEI AT INTERMEDIATE ENERGIES

1995 ◽  
Vol 04 (03) ◽  
pp. 563-586 ◽  
Author(s):  
YU. A. BEREZHNOY ◽  
V. YU. KORDA
Keyword(s):  
Elastic Scattering ◽  
Closed Form ◽  
Cross Sections ◽  
Differential Cross ◽  
Particle System ◽  
Center Of Mass ◽  
Scattering Angle ◽  
Intermediate Energies ◽  
Oscillating Functions ◽  
Analytical Expressions

We present a closed-form description that enables us to obtain the analytical expressions for the elastic scattering and dissociation differential cross-sections of deuterons and 3H-nuclei by heavy target nuclei. The resulting expressions are used to analyze the data for the 110 MeV deuterons elastically scattered on 208Pb-nuclei. The dissociation cross-sections of deuterons and 3H-nuclei are the oscillating functions of the scattering angle of the released two- and three-nucleon-particle system center-of-mass.

The interaction of atomic particles with solid surfaces at intermediate energies IV. The energy and angular distributions of particles scattered with electric charge from polycrystalline platinum at bombarding energies of 500-5000 eV

1974 ◽  
Vol 341 (1625) ◽  
pp. 213-231 ◽  
Keyword(s):  
Charged Particles ◽  
Solid Surfaces ◽  
Hydrogen Ion ◽  
Angular Distributions ◽  
Sodium Potassium ◽  
Intermediate Energies ◽  
Polycrystalline Platinum ◽  
Composite Spectra ◽  
Energy And Angular Distributions ◽  
Bombarding Energy

The distributions in angle and energy for charged particles emitted from polycrystalline platinum bombarded with ions of hydrogen, sodium, potassium and some hydrocarbons, have been measured, in continuation of previous work (Cawthron, Cotterell & Oliphant 1969 a , b , parts I and II; 1970, part III) to lower energies. Composite spectra are presented, including ions of both signs. The flux of emitted charged particles, under hydrogen ion bombardment, is shown to contain approximately equal numbers of protons and H¯ ions, except at the lowest bombarding energies, where the latter apparently predominate. Scattering in all cases is shown to increase with bombarding energy over the range covered, the increase being near linear for hydrogen and very rapid for alkalimetal ions. In all cases the total emission of charged particles is very small at the lowest bombarding energies employed.

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