PARAMETRIZED FORM OF THE DYNAMIC POLARIZATION POTENTIAL FOR THE 6He + 208Pb INTERACTION

2013 ◽  
Vol 28 (27) ◽  
pp. 1350112 ◽  
Author(s):  
M. AYGUN ◽  
I. BOZTOSUN ◽  
K. RUSEK
Keyword(s):  
Experimental Data ◽  
Optical Model ◽  
Polarization Potential ◽  
Dynamic Polarization ◽  
Folding Model ◽  
Weakly Bound ◽  
Density Distributions ◽  
Double Folding Model ◽  
Double Folding ◽  
Bare Potential

We investigate the dynamic polarization potential (DPP) contribution to the bare potential obtained by using double-folding model (DFM) within the framework of the Optical Model (OM) for the different density distributions of 6 He nucleus scattered from 208 Pb target at 22 MeV. The final results are in agreement with the experimental data. We are proposing a new parametrization of the DPP that could be very useful in other weakly bound projectile studies.

FOLDING MODEL ANALYSIS OF 6He + 12C ELASTIC SCATTERING

2008 ◽  
Vol 17 (04) ◽  
pp. 715-733 ◽  
Author(s):  
M. EL-AZAB FARID ◽  
A. M. A. NOSSAIR ◽  
AWAD A. IBRAHEEM
Keyword(s):  
Elastic Scattering ◽  
Optical Model ◽  
Halo Nucleus ◽  
Nucleon Nucleon ◽  
Matter Density ◽  
Polarization Potential ◽  
Dynamic Polarization ◽  
Folding Model ◽  
Nuclear Matter Density ◽  
Double Folding

Elastic scattering of the two-neutron halo nucleus, 6 He , on 12 C target at 38.3 and 41.6 MeV/nucleon has been analyzed in the framework of the double-folding optical model. Real double-folded potentials based on the realistic density-dependent DDM3Y and JLM effective nucleon–nucleon interactions are generated using different forms of the nuclear matter density distribution of 6 He . The imaginary optical potentials are taken in the conventional Woods–Saxon form. The bare (unnormalized) real folded potentials derived from the JLM interaction are more successful in reproducing the data at both energies than those derived from the DDM3Y interaction. The effect of contribution of the dynamic polarization potential is also studied. A semimicroscopic approximation is proposed to simulate this potential by introducing a repulsive real part extracted from the generated folded potential. Fits to data have been slightly improved by considering this approximation.

scholarly journals A comprehensive description of elastic scattering angular distributions for eight different density distribution of 32S nucleus

2020 ◽  
Vol 66 (3 May-Jun) ◽  
pp. 336
Author(s):  
T. Ulucay ◽  
M. Aygun
Keyword(s):  
Elastic Scattering ◽  
Optical Model ◽  
Model Potential ◽  
Angular Distributions ◽  
Folding Model ◽  
Density Distributions ◽  
Double Folding Model ◽  
Optical Model Potential ◽  
Wide Energy ◽  
Double Folding

The elastic scattering angular distributions of 32S projectile by 12C, 27Al, 40Ca, 48Ca, 48Ti, 58Ni, 63Cu, 64Ni, 76Ge, 96Mo and 100Mo targets over the energy range 83.3 - 180 MeV are analyzed in the framework of the double folding model based on the optical model. The real part of the optical model potential is obtained by using double folding model for eight different density distributions of 32S which consist of Ngo, SP, 2pF, G1, G2, S, 3pF, and HFB. The imaginary part of the optical model potential is accepted as the Woods-Saxon (WS) potential. The theoretical results successfully reproduce the experimental data over both a wide energy and a wide target nucleus. Finally, simple and useful formulas which predict imaginary potential depths of each density are derived based on the elastic scattering results.

FOLDING MODEL ANALYSIS OF 6He+120Sn ELASTIC SCATTERING

2013 ◽  
Vol 22 (11) ◽  
pp. 1350086 ◽  
Author(s):  
ZAKARIA M. M. MAHMOUD ◽  
AWAD A. IBRAHEEM ◽  
SHERIF R. MOKHTAR
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Imaginary Part ◽  
Optical Model ◽  
Effective Interaction ◽  
Phenomenological Analysis ◽  
Folding Model ◽  
The Real ◽  
Hartree Fock ◽  
Double Folding

In this study, the elastic scattering of 6 He projectile from 120 Sn nucleus has been analyzed in terms of optical model (OM). Microscopic double folding (DF) model has been used to generate the real central part of the OM potential. The imaginary part has been restricted to Woods–Saxon phenomenological form. Skyrme–Hartree–Fock, Symmetrized Fermi and Gaussian-Exponential densities for 6 He nucleus while Hartree–Fock–Bogolyubov (HFB) density of 120 Sn nucleus have been used to construct the real DF potential. For the effective interaction, the widely used M3Y has been adopted in the DF procedure. The results of DF have been compared with both literature experimental data and phenomenological analysis.

Folding model analysis of 28Si elastic scattering using different density distributions

2021 ◽  
pp. 2150176
Author(s):  
M. Aygun
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Folding Model ◽  
Density Distributions ◽  
Double Folding Model ◽  
Independent Form ◽  
Double Folding ◽  
Scattering Cross Sections ◽  
Theoretical Results ◽  
Good Agreement

The elastic scattering cross-sections of [Formula: see text]Si projectile by [Formula: see text]Al, [Formula: see text]Si, [Formula: see text]Ni, [Formula: see text]Ni and [Formula: see text]Pb targets are analyzed using the double folding model based on the effective M3Y interaction which is known as the most popular density independent form. In the calculations of the double folding model, 16 different density distributions of [Formula: see text]Si nucleus are examined. A very good agreement between experimental data and theoretical results is obtained, and also the literature results support our results. In addition, dependence on incident energy, target atomic number and target mass number of the imaginary potential depth is studied, and new and global equations are proposed.

scholarly journals Density distribution effect on the analysis of the 6Li+ 58Ni reaction

2019 ◽  
Vol 17 (3) ◽  
Author(s):  
Fatemeh Torabi ◽  
Elí Francisco Aguilera Reyes
Keyword(s):  
Elastic Scattering ◽  
Density Distribution ◽  
Cross Sections ◽  
Optical Model ◽  
Density Variation ◽  
Polarization Potential ◽  
Direct Reaction ◽  
Weakly Bound ◽  
Density Distributions ◽  
Fusion Data

The effect of density variation on the optical-model (OM) analysis of 6Li + 58Ni is investigated by using bare potentials extracted from different density distributions of the weakly-bound 6Li nucleus. For each of the bare potentials, the real and imaginaru parts of the direct-reaction and fusion polarization potentials are deduced from respective X2 fittings to the elastic scattering and fusion data. The results obtained show that variations in the density distribution of the weakly-bound projectile can change the strengths of the dynamic direct-reaction polarization potential, however, it cannot make a noticeable difference on the OM predictions of fusion cross sections.

scholarly journals An investigation of alpha-transfer reaction 28Si(20Ne,16O)32S

2021 ◽  
Vol 67 (4 Jul-Aug) ◽  
pp. 041201
Author(s):  
M. Aygun
Keyword(s):  
Experimental Data ◽  
Imaginary Part ◽  
Optical Model ◽  
Transfer Reaction ◽  
Saxon Potential ◽  
The Real ◽  
Density Distributions ◽  
Double Folding ◽  
Better Than ◽  
Good Agreement

The alpha-transfer reaction 28Si(20Ne,16O)32S at 52.3 and 70 MeV is examined by using the double-folding (DF) based on the optical model. The real part is obtained for ten different density distributions of 20Ne projectile. For the imaginary part, the Woods-Saxon potential is used. The obtained results are compared with the experimental data of alpha-transfer reaction as well as the literature results. It is seen that the results are in good agreement with the data, and are better than the literature results.

Microscopic spin-orbit potential for p +6He elastic scattering

2019 ◽  
Vol 28 (09) ◽  
pp. 1950074
Author(s):  
Zakaria M. M. Mahmoud ◽  
Awad A. Ibraheem ◽  
M. A. Hassanain
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Cross Sections ◽  
Optical Model ◽  
Spin Orbit ◽  
Current Form ◽  
Density Distributions ◽  
Orbit Potential ◽  
Scattering Cross Sections ◽  
Good Agreement

In this work, we simultaneously reanalyzed the differential elastic scattering cross-sections ([Formula: see text]) and the vector analyzing power ([Formula: see text]) of [Formula: see text]He elastic scattering. This analysis was performed using the folded optical model for both real central and spin-orbit (SO) potentials, respectively. For the imaginary central, we used the usual Woods-Saxon (WS) form. Three different model density distributions are used to calculate the potential. We aimed to examine the applicability of the microscopically derived SO potential and the structure effect of 6He nucleus. The presence of the [Formula: see text] experimental data of [Formula: see text]He makes it interesting for this study. Our calculations showed that the three densities gave similar predictions for the cross-sections data. The three microscopic SO potentials calculations of [Formula: see text] are not in a good agreement with the experimental data. We concluded that the SO formalism in its current form needs more investigations for exotic halo nuclei.

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